From 2ae3dfa11929e866a51692a6a2f94557180011c4 Mon Sep 17 00:00:00 2001
From: Dominik Schilling <dominikschilling+git@gmail.com>
Date: Tue, 10 Mar 2015 21:20:26 +0000
Subject: [PATCH] Customizer: Add title attributes to iframes.

props afercia.
fixes #31202.
Built from https://develop.svn.wordpress.org/trunk@31704


git-svn-id: http://core.svn.wordpress.org/trunk@31685 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-admin/js/customize-controls.js      | 12 +++++++-----
 wp-admin/js/customize-controls.min.js  |  2 +-
 wp-admin/theme-install.php             |  2 +-
 wp-includes/js/customize-loader.js     |  2 +-
 wp-includes/js/customize-loader.min.js |  2 +-
 wp-includes/script-loader.php          | 16 +++++++++-------
 wp-includes/theme.php                  |  3 ++-
 wp-includes/version.php                |  2 +-
 8 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/wp-admin/js/customize-controls.js b/wp-admin/js/customize-controls.js
index 951fb4cfd0..831a46e240 100644
--- a/wp-admin/js/customize-controls.js
+++ b/wp-admin/js/customize-controls.js
@@ -2023,7 +2023,7 @@
 				response = response.slice( 0, index ) + response.slice( index + signature.length );
 
 				// Create the iframe and inject the html content.
-				self.iframe = $('<iframe />').appendTo( self.container );
+				self.iframe = $( '<iframe />', { 'title': api.l10n.previewIframeTitle } ).appendTo( self.container );
 
 				// Bind load event after the iframe has been added to the page;
 				// otherwise it will fire when injected into the DOM.
@@ -2055,8 +2055,9 @@
 				deferred.rejectWith( self, [ 'logged out' ] );
 			};
 
-			if ( this.triedLogin )
+			if ( this.triedLogin ) {
 				return reject();
+			}
 
 			// Check if we have an admin cookie.
 			$.get( api.settings.url.ajax, {
@@ -2064,10 +2065,11 @@
 			}).fail( reject ).done( function( response ) {
 				var iframe;
 
-				if ( '1' !== response )
+				if ( '1' !== response ) {
 					reject();
+				}
 
-				iframe = $('<iframe src="' + self.previewUrl() + '" />').hide();
+				iframe = $( '<iframe />', { 'src': self.previewUrl(), 'title': api.l10n.previewIframeTitle } ).hide();
 				iframe.appendTo( self.container );
 				iframe.load( function() {
 					self.triedLogin = true;
@@ -2327,7 +2329,7 @@
 				url:     api.settings.url.login
 			});
 
-			iframe = $('<iframe src="' + api.settings.url.login + '" />').appendTo( this.container );
+			iframe = $( '<iframe />', { 'src': api.settings.url.login, 'title': api.l10n.loginIframeTitle } ).appendTo( this.container );
 
 			messenger.targetWindow( iframe[0].contentWindow );
 
diff --git a/wp-admin/js/customize-controls.min.js b/wp-admin/js/customize-controls.min.js
index 964ded55bb..fd7d4db734 100644
--- a/wp-admin/js/customize-controls.min.js
+++ b/wp-admin/js/customize-controls.min.js
@@ -1,2 +1,2 @@
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a,b=this.frame.state().get("selection").first().toJSON(),c=window._wpmejsSettings||{};this.params.attachment=b,this.setting(b.url),a=this.container.find("audio, video").get(0),a?this.player=new MediaElementPlayer(a,c):this.cleanupPlayer()},success:function(){},removerVisibility:function(){}}),e.ImageControl=e.UploadControl.extend({thumbnailSrc:function(){}}),e.BackgroundControl=e.UploadControl.extend({ready:function(){e.UploadControl.prototype.ready.apply(this,arguments)},select:function(){e.UploadControl.prototype.select.apply(this,arguments),wp.ajax.post("custom-background-add",{nonce:_wpCustomizeBackground.nonces.add,wp_customize:"on",theme:e.settings.theme.stylesheet,attachment_id:this.params.attachment.id})}}),e.HeaderControl=e.Control.extend({ready:function(){this.btnRemove=b("#customize-control-header_image .actions .remove"),this.btnNew=b("#customize-control-header_image .actions 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c=13===a.which,d=b(a.target);c&&(d.is("input:not([type=button])")||d.is("select"))&&a.preventDefault()}),b("#customize-info").find("> .accordion-section-title").on("click keydown",function(a){if(!e.utils.isKeydownButNotEnterEvent(a)){a.preventDefault();var c=b(this).parent(),d=c.find(".accordion-section-content:first");c.hasClass("cannot-expand")||(c.hasClass("open")?(c.toggleClass("open"),d.slideUp(e.Panel.prototype.defaultExpandedArguments.duration)):(d.slideDown(e.Panel.prototype.defaultExpandedArguments.duration),c.toggleClass("open")))}}),e.previewer=new e.Previewer({container:"#customize-preview",form:"#customize-controls",previewUrl:e.settings.url.preview,allowedUrls:e.settings.url.allowed,signature:"WP_CUSTOMIZER_SIGNATURE"},{nonce:e.settings.nonce,query:function(){var a={};return e.each(function(b,c){b._dirty&&(a[c]=b())}),{wp_customize:"on",theme:e.settings.theme.stylesheet,customized:JSON.stringify(a),nonce:this.nonce.preview}},save:function(){var a,c,f=this,g=b.extend(this.query(),{nonce:this.nonce.save}),h=e.state("processing");d.addClass("saving"),c=function(){var a=wp.ajax.post("customize_save",g);e.trigger("save",a),a.always(function(){d.removeClass("saving")}),a.fail(function(a){"0"===a?a="not_logged_in":"-1"===a&&(a="invalid_nonce"),"invalid_nonce"===a?f.cheatin():"not_logged_in"===a&&(f.preview.iframe.hide(),f.login().done(function(){f.save(),f.preview.iframe.show()})),e.trigger("error",a)}),a.done(function(a){e.each(function(a){a._dirty=!1}),e.trigger("saved",a)})},0===h()?c():(a=function(){0===h()&&(e.state.unbind("change",a),c())},e.state.bind("change",a))}}),e.previewer.bind("nonce",function(a){b.extend(this.nonce,a)}),b.each(e.settings.settings,function(a,b){e.create(a,a,b.value,{transport:b.transport,previewer:e.previewer})}),b.each(e.settings.panels,function(a,b){var c,d=e.panelConstructor[b.type]||e.Panel;c=new d(a,{params:b}),e.panel.add(a,c)}),b.each(e.settings.sections,function(a,b){var c,d=e.sectionConstructor[b.type]||e.Section;c=new d(a,{params:b}),e.section.add(a,c)}),b.each(e.settings.controls,function(a,b){var c,d=e.controlConstructor[b.type]||e.Control;c=new d(a,{params:b,previewer:e.previewer}),e.control.add(a,c)}),_.each(["panel","section","control"],function(a){var b,c=e.settings.autofocus[a];c&&e[a](c)&&(b=e[a](c),b.deferred.embedded.done(function(){e.previewer.deferred.active.done(function(){b.focus()})}))}),e.reflowPaneContents=_.bind(function(){var a,c,d,f=[],g=!1;document.activeElement&&(c=b(document.activeElement)),e.panel.each(function(b){var c=b.sections(),d=_.pluck(c,"container");f.push(b),a=b.container.find("ul:first"),e.utils.areElementListsEqual(d,a.children("[id]"))||(_(c).each(function(b){a.append(b.container)}),g=!0)}),e.section.each(function(b){var c=b.controls(),d=_.pluck(c,"container");b.panel()||f.push(b),a=b.container.find("ul:first"),e.utils.areElementListsEqual(d,a.children("[id]"))||(_(c).each(function(b){a.append(b.container)}),g=!0)}),f.sort(e.utils.prioritySort),d=_.pluck(f,"container"),a=b("#customize-theme-controls").children("ul"),e.utils.areElementListsEqual(d,a.children())||(_(f).each(function(b){a.append(b.container)}),g=!0),e.panel.each(function(a){var b=a.active();a.active.callbacks.fireWith(a.active,[b,b])}),e.section.each(function(a){var b=a.active();a.active.callbacks.fireWith(a.active,[b,b])}),g&&c&&c.focus()},e),e.bind("ready",e.reflowPaneContents),e.reflowPaneContents=_.debounce(e.reflowPaneContents,100),b([e.panel,e.section,e.control]).each(function(a,b){b.bind("add",e.reflowPaneContents),b.bind("change",e.reflowPaneContents),b.bind("remove",e.reflowPaneContents)}),e.previewer.previewUrl()?e.previewer.refresh():e.previewer.previewUrl(e.settings.url.home),function(){var a=new e.Values,b=a.create("saved"),c=a.create("activated"),d=a.create("processing");a.bind("change",function(){c()?b()?(i.val(e.l10n.saved).prop("disabled",!0),h.find(".screen-reader-text").text(e.l10n.close)):(i.val(e.l10n.save).prop("disabled",!1),h.find(".screen-reader-text").text(e.l10n.cancel)):(i.val(e.l10n.activate).prop("disabled",!1),h.find(".screen-reader-text").text(e.l10n.cancel))}),b(!0),c(e.settings.theme.active),d(0),e.bind("change",function(){a("saved").set(!1)}),e.bind("saved",function(){a("saved").set(!0),a("activated").set(!0)}),c.bind(function(a){a&&e.trigger("activated")}),e.state=a}(),i.click(function(a){e.previewer.save(),a.preventDefault()}).keydown(function(a){9!==a.which&&(13===a.which&&e.previewer.save(),a.preventDefault())}),b("#customize-header-actions").on("click 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b.params.instanceNumber?a.params.instanceNumber-b.params.instanceNumber:a.priority()-b.priority()},e.utils.isKeydownButNotEnterEvent=function(a){return"keydown"===a.type&&13!==a.which},e.utils.areElementListsEqual=function(a,c){var d=a.length===c.length&&-1===_.indexOf(_.map(_.zip(a,c),function(a){return b(a[0]).is(a[1])}),!1);return d},c=e.Class.extend({defaultActiveArguments:{duration:"fast",completeCallback:b.noop},defaultExpandedArguments:{duration:"fast",completeCallback:b.noop},initialize:function(a,c){var d=this;d.id=a,d.params={},b.extend(d,c||{}),d.container=b(d.params.content),d.deferred={embedded:new b.Deferred},d.priority=new e.Value,d.active=new e.Value,d.activeArgumentsQueue=[],d.expanded=new e.Value,d.expandedArgumentsQueue=[],d.active.bind(function(a){var c=d.activeArgumentsQueue.shift();c=b.extend({},d.defaultActiveArguments,c),a=a&&d.isContextuallyActive(),d.onChangeActive(a,c)}),d.expanded.bind(function(a){var c=d.expandedArgumentsQueue.shift();c=b.extend({},d.defaultExpandedArguments,c),d.onChangeExpanded(a,c)}),d.attachEvents(),e.utils.bubbleChildValueChanges(d,["priority","active"]),d.priority.set(isNaN(d.params.priority)?100:d.params.priority),d.active.set(d.params.active),d.expanded.set(!1)},ready:function(){},_children:function(a,b){var c=this,d=[];return e[b].each(function(b){b[a].get()===c.id&&d.push(b)}),d.sort(e.utils.prioritySort),d},isContextuallyActive:function(){throw new Error("Container.isContextuallyActive() must be overridden in a subclass.")},onChangeActive:function(a,c){var d="resolved"===e.previewer.deferred.active.state()?c.duration:0;b.contains(document,this.container)?a?this.container.stop(!0,!0).slideDown(d,c.completeCallback):this.container.stop(!0,!0).slideUp(d,c.completeCallback):(this.container.toggle(a),c.completeCallback&&c.completeCallback())},_toggleActive:function(a,b){var c=this;return b=b||{},a&&this.active.get()||!a&&!this.active.get()?(b.unchanged=!0,c.onChangeActive(c.active.get(),b),!1):(b.unchanged=!1,this.activeArgumentsQueue.push(b),this.active.set(a),!0)},activate:function(a){return this._toggleActive(!0,a)},deactivate:function(a){return this._toggleActive(!1,a)},onChangeExpanded:function(){throw new Error("Must override with subclass.")},_toggleExpanded:function(a,b){var c=this;b=b||{};var d=this,e=b.completeCallback;return b.completeCallback=function(){e&&e.apply(d,arguments),d.container.trigger(a?"expanded":"collapsed")},a&&this.expanded.get()||!a&&!this.expanded.get()?(b.unchanged=!0,c.onChangeExpanded(c.expanded.get(),b),!1):(b.unchanged=!1,this.expandedArgumentsQueue.push(b),this.expanded.set(a),!0)},expand:function(a){return this._toggleExpanded(!0,a)},collapse:function(a){return this._toggleExpanded(!1,a)},focus:d}),e.Section=c.extend({initialize:function(a,d){var f=this;c.prototype.initialize.call(f,a,d),f.id=a,f.panel=new 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this._children("section","control")},onChangeExpanded:function(a,b){var c,d=this,f=d.container.find(".accordion-section-content");a?(c=b.unchanged?b.completeCallback:function(){f.stop().slideDown(b.duration,b.completeCallback),d.container.addClass("open")},b.allowMultiple||e.section.each(function(a){a!==d&&a.collapse({duration:b.duration})}),d.panel()?e.panel(d.panel()).expand({duration:b.duration,completeCallback:c}):c()):(d.container.removeClass("open"),f.slideUp(b.duration,b.completeCallback))}}),e.ThemesSection=e.Section.extend({currentTheme:"",overlay:"",template:"",ready:function(){var a=this;a.overlay=a.container.find(".theme-overlay"),a.template=wp.template("customize-themes-details-view"),b("body").on("keyup",function(b){a.overlay.find(".theme-wrap").is(":visible")&&(39===b.keyCode&&a.nextTheme(),37===b.keyCode&&a.previousTheme(),27===b.keyCode&&a.closeDetails())})},attachEvents:function(){var a=this;a.container.find(".accordion-section-title").on("click 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a=e.control("theme_"+this.currentTheme),b=a.container.next("li.customize-control-theme"),b.length?(b=b[0].id.replace("customize-control-",""),a=e.control(b),a.params.theme):!1},previousTheme:function(){var a=this;a.getPreviousTheme()&&a.showDetails(a.getPreviousTheme(),function(){a.overlay.find(".left").focus()})},getPreviousTheme:function(){var a,b;return a=e.control("theme_"+this.currentTheme),b=a.container.prev("li.customize-control-theme"),b.length?(b=b[0].id.replace("customize-control-",""),a=e.control(b),a.params.theme):!1},updateLimits:function(){this.getNextTheme()||this.overlay.find(".right").addClass("disabled"),this.getPreviousTheme()||this.overlay.find(".left").addClass("disabled")},showDetails:function(a,c){var d=this;c=c||function(){},d.currentTheme=a.id,d.overlay.html(d.template(a)).fadeIn("fast").focus(),b("body").addClass("modal-open"),d.containFocus(d.overlay),d.updateLimits(),c()},closeDetails:function(){b("body").removeClass("modal-open"),this.overlay.fadeOut("fast"),e.control("theme_"+this.currentTheme).focus()},containFocus:function(a){var c;a.on("keydown",function(d){return 9===d.keyCode?(c=b(":tabbable",a),c.last()[0]!==d.target||d.shiftKey?c.first()[0]===d.target&&d.shiftKey?(c.last().focus(),!1):void 0:(c.first().focus(),!1)):void 0})}}),e.Panel=c.extend({initialize:function(a,b){var d=this;c.prototype.initialize.call(d,a,b),d.embed(),d.deferred.embedded.done(function(){d.ready()})},embed:function(){var a=this,c=b("#customize-theme-controls > ul");a.container.parent().is(c)||c.append(a.container),a.deferred.embedded.resolve()},attachEvents:function(){var a,b=this;b.container.find(".accordion-section-title").on("click keydown",function(a){e.utils.isKeydownButNotEnterEvent(a)||(a.preventDefault(),b.expanded()||b.expand())}),a=b.container.find(".panel-meta:first"),a.find("> .accordion-section-title").on("click keydown",function(c){if(!e.utils.isKeydownButNotEnterEvent(c)&&(c.preventDefault(),!a.hasClass("cannot-expand"))){var d=a.find(".accordion-section-content:first");a.hasClass("open")?(a.toggleClass("open"),d.slideUp(b.defaultExpandedArguments.duration)):(d.slideDown(b.defaultExpandedArguments.duration),a.toggleClass("open"))}})},sections:function(){return this._children("panel","section")},isContextuallyActive:function(){var a=this,b=a.sections(),c=0;return _(b).each(function(a){a.active()&&a.isContextuallyActive()&&(c+=1)}),0!==c},onChangeExpanded:function(a,b){if(b.unchanged)return void(b.completeCallback&&b.completeCallback());var c,d,f=this,g=f.container.closest(".accordion-section"),h=g.closest(".wp-full-overlay"),i=g.closest(".accordion-container"),j=i.find(".open"),k=h.find("#customize-theme-controls > ul > .accordion-section > .accordion-section-title").add("#customize-info > 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d,f,g,h=this;h.params={},b.extend(h,c||{}),h.id=a,h.selector="#customize-control-"+a.replace(/\]/g,"").replace(/\[/g,"-"),h.templateSelector="customize-control-"+h.params.type+"-content",h.container=b(h.params.content?h.params.content:h.selector),h.deferred={embedded:new b.Deferred},h.section=new e.Value,h.priority=new e.Value,h.active=new e.Value,h.activeArgumentsQueue=[],h.elements=[],d=h.container.find("[data-customize-setting-link]"),f={},d.each(function(){var a,c=b(this);if(c.is(":radio")){if(a=c.prop("name"),f[a])return;f[a]=!0,c=d.filter('[name="'+a+'"]')}e(c.data("customizeSettingLink"),function(a){var b=new e.Element(c);h.elements.push(b),b.sync(a),b.set(a())})}),h.active.bind(function(a){var c=h.activeArgumentsQueue.shift();c=b.extend({},h.defaultActiveArguments,c),h.onChangeActive(a,c)}),h.section.set(h.params.section),h.priority.set(isNaN(h.params.priority)?10:h.params.priority),h.active.set(h.params.active),e.utils.bubbleChildValueChanges(h,["section","priority","active"]),g=b.map(h.params.settings,function(a){return a}),e.apply(e,g.concat(function(){var a;h.settings={};for(a in h.params.settings)h.settings[a]=e(h.params.settings[a]);h.setting=h.settings["default"]||null,h.embed()})),h.deferred.embedded.done(function(){h.ready()})},embed:function(){var a,b=this;a=function(a){var c;a&&e.section(a,function(a){a.deferred.embedded.done(function(){c=a.container.find("ul:first"),b.container.parent().is(c)||(c.append(b.container),b.renderContent()),b.deferred.embedded.resolve()})})},b.section.bind(a),a(b.section.get())},ready:function(){},expand:function(a){e.section(this.section()).expand(a)},focus:d,onChangeActive:function(a,c){b.contains(document,this.container)?a?this.container.slideDown(c.duration,c.completeCallback):this.container.slideUp(c.duration,c.completeCallback):(this.container.toggle(a),c.completeCallback&&c.completeCallback())},toggle:function(a){return this.onChangeActive(a,this.defaultActiveArguments)},activate:c.prototype.activate,deactivate:c.prototype.deactivate,_toggleActive:c.prototype._toggleActive,dropdownInit:function(){var a=this,b=this.container.find(".dropdown-status"),c=this.params,d=!1,f=function(a){"string"==typeof a&&c.statuses&&c.statuses[a]?b.html(c.statuses[a]).show():b.hide()};this.container.on("click 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keydown",".upload-button",a.pausePlayer),a.container.on("click keydown",".thumbnail-image img",a.openFrame),a.container.on("click keydown",".default-button",a.restoreDefault),a.container.on("click keydown",".remove-button",a.pausePlayer),a.container.on("click keydown",".remove-button",a.removeFile),a.container.on("click keydown",".remove-button",a.cleanupPlayer),e.section(a.section()).container.on("expanded",function(){a.player&&a.player.setControlsSize()}).on("collapsed",function(){a.pausePlayer()}),a.setting.bind(function(){a.renderContent()})},pausePlayer:function(){this.player&&this.player.pause()},cleanupPlayer:function(){this.player&&wp.media.mixin.removePlayer(this.player)},openFrame:function(a){e.utils.isKeydownButNotEnterEvent(a)||(a.preventDefault(),this.frame||this.initFrame(),this.frame.open())},initFrame:function(){this.frame=wp.media({button:{text:this.params.button_labels.frame_button},states:[new wp.media.controller.Library({title:this.params.button_labels.frame_title,library:wp.media.query({type:this.params.mime_type}),multiple:!1,date:!1})]}),this.frame.on("select",this.select)},select:function(){var a,b=this.frame.state().get("selection").first().toJSON(),c=window._wpmejsSettings||{};this.params.attachment=b,this.setting(b.id),a=this.container.find("audio, video").get(0),a?this.player=new MediaElementPlayer(a,c):this.cleanupPlayer()},restoreDefault:function(a){e.utils.isKeydownButNotEnterEvent(a)||(a.preventDefault(),this.params.attachment=this.params.defaultAttachment,this.setting(this.params.defaultAttachment.url))},removeFile:function(a){e.utils.isKeydownButNotEnterEvent(a)||(a.preventDefault(),this.params.attachment={},this.setting(""),this.renderContent())}}),e.UploadControl=e.MediaControl.extend({select:function(){var a,b=this.frame.state().get("selection").first().toJSON(),c=window._wpmejsSettings||{};this.params.attachment=b,this.setting(b.url),a=this.container.find("audio, video").get(0),a?this.player=new MediaElementPlayer(a,c):this.cleanupPlayer()},success:function(){},removerVisibility:function(){}}),e.ImageControl=e.UploadControl.extend({thumbnailSrc:function(){}}),e.BackgroundControl=e.UploadControl.extend({ready:function(){e.UploadControl.prototype.ready.apply(this,arguments)},select:function(){e.UploadControl.prototype.select.apply(this,arguments),wp.ajax.post("custom-background-add",{nonce:_wpCustomizeBackground.nonces.add,wp_customize:"on",theme:e.settings.theme.stylesheet,attachment_id:this.params.attachment.id})}}),e.HeaderControl=e.Control.extend({ready:function(){this.btnRemove=b("#customize-control-header_image .actions .remove"),this.btnNew=b("#customize-control-header_image .actions 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c,d,f,g,h,i,j=parseInt(_wpCustomizeHeader.data.width,10),k=parseInt(_wpCustomizeHeader.data.height,10),l=!!parseInt(_wpCustomizeHeader.data["flex-width"],10),m=!!parseInt(_wpCustomizeHeader.data["flex-height"],10);return h=a.get("width"),g=a.get("height"),this.headerImage=new e.HeaderTool.ImageModel,this.headerImage.set({themeWidth:j,themeHeight:k,themeFlexWidth:l,themeFlexHeight:m,imageWidth:h,imageHeight:g}),b.set("canSkipCrop",!this.headerImage.shouldBeCropped()),c=j/k,d=h,f=g,d/f>c?(k=f,j=k*c):(j=d,k=j/c),i={handles:!0,keys:!0,instance:!0,persistent:!0,imageWidth:h,imageHeight:g,x1:0,y1:0,x2:j,y2:k},m===!1&&l===!1&&(i.aspectRatio=j+":"+k),m===!1&&(i.maxHeight=k),l===!1&&(i.maxWidth=j),i},openMedia:function(a){var b=_wpMediaViewsL10n;a.preventDefault(),this.frame=wp.media({button:{text:b.selectAndCrop,close:!1},states:[new wp.media.controller.Library({title:b.chooseImage,library:wp.media.query({type:"image"}),multiple:!1,date:!1,priority:20,suggestedWidth:_wpCustomizeHeader.data.width,suggestedHeight:_wpCustomizeHeader.data.height}),new wp.media.controller.Cropper({imgSelectOptions:this.calculateImageSelectOptions})]}),this.frame.on("select",this.onSelect,this),this.frame.on("cropped",this.onCropped,this),this.frame.on("skippedcrop",this.onSkippedCrop,this),this.frame.open()},onSelect:function(){this.frame.setState("cropper")},onCropped:function(a){var b=a.post_content,c=a.attachment_id,d=a.width,e=a.height;this.setImageFromURL(b,c,d,e)},onSkippedCrop:function(a){var b=a.get("url"),c=a.get("width"),d=a.get("height");this.setImageFromURL(b,a.id,c,d)},setImageFromURL:function(a,b,c,d){var f,g={};g.url=a,g.thumbnail_url=a,g.timestamp=_.now(),b&&(g.attachment_id=b),c&&(g.width=c),d&&(g.height=d),f=new e.HeaderTool.ImageModel({header:g,choice:a.split("/").pop()}),e.HeaderTool.UploadsList.add(f),e.HeaderTool.currentHeader.set(f.toJSON()),f.save(),f.importImage()},removeImage:function(){e.HeaderTool.currentHeader.trigger("hide"),e.HeaderTool.CombinedList.trigger("control:removeImage")}}),e.ThemeControl=e.Control.extend({ready:function(){var a=this;a.container.on("click keydown",".theme",function(b){e.utils.isKeydownButNotEnterEvent(b)||"button"!==b.target.className&&e.section(a.section()).showDetails(a.params.theme)}),a.container.on("click keydown",".theme-actions .button",function(a){e.utils.isKeydownButNotEnterEvent(a)||b(".wp-full-overlay").addClass("customize-loading")})},filter:function(a){var b=this,c=b.params.theme.name+" "+b.params.theme.description+" "+b.params.theme.tags+" "+b.params.theme.author;c=c.toLowerCase().replace("-"," "),-1!==c.search(a)?b.activate():b.deactivate()}}),e.defaultConstructor=e.Setting,e.control=new e.Values({defaultConstructor:e.Control}),e.section=new e.Values({defaultConstructor:e.Section}),e.panel=new e.Values({defaultConstructor:e.Panel}),e.PreviewFrame=e.Messenger.extend({sensitivity:2e3,initialize:function(a,c){var d=b.Deferred();d.promise(this),this.container=a.container,this.signature=a.signature,b.extend(a,{channel:e.PreviewFrame.uuid()}),e.Messenger.prototype.initialize.call(this,a,c),this.add("previewUrl",a.previewUrl),this.query=b.extend(a.query||{},{customize_messenger_channel:this.channel()}),this.run(d)},run:function(a){var c=this,d=!1,f=!1;this._ready&&this.unbind("ready",this._ready),this._ready=function(){f=!0,d&&a.resolveWith(c)},this.bind("ready",this._ready),this.bind("ready",function(a){if(this.container.addClass("iframe-ready"),a){var b={panel:a.activePanels,section:a.activeSections,control:a.activeControls};_(b).each(function(a,b){e[b].each(function(b,c){var d=!(!a||!a[c]);b.active(d)})})}}),this.request=b.ajax(this.previewUrl(),{type:"POST",data:this.query,xhrFields:{withCredentials:!0}}),this.request.fail(function(){a.rejectWith(c,["request failure"])}),this.request.done(function(g){var h,i=c.request.getResponseHeader("Location"),j=c.signature;return i&&i!==c.previewUrl()?void a.rejectWith(c,["redirect",i]):"0"===g?void c.login(a):"-1"===g?void a.rejectWith(c,["cheatin"]):(h=g.lastIndexOf(j),-1===h||h<g.lastIndexOf("</html>")?void a.rejectWith(c,["unsigned"]):(g=g.slice(0,h)+g.slice(h+j.length),c.iframe=b("<iframe />",{title:e.l10n.previewIframeTitle}).appendTo(c.container),c.iframe.one("load",function(){d=!0,f?a.resolveWith(c):setTimeout(function(){a.rejectWith(c,["ready timeout"])},c.sensitivity)}),c.targetWindow(c.iframe[0].contentWindow),c.targetWindow().document.open(),c.targetWindow().document.write(g),void c.targetWindow().document.close()))})},login:function(a){var c,d=this;return c=function(){a.rejectWith(d,["logged 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this.loading)},refresh:function(){var a=this;this.send("loading-initiated"),this.abort(),this.loading=new e.PreviewFrame({url:this.url(),previewUrl:this.previewUrl(),query:this.query()||{},container:this.container,signature:this.signature}),this.loading.done(function(){this.bind("synced",function(){a.preview&&a.preview.destroy(),a.preview=this,delete a.loading,a.targetWindow(this.targetWindow()),a.channel(this.channel()),a.deferred.active.resolve(),a.send("active")}),this.send("sync",{scroll:a.scroll,settings:e.get()})}),this.loading.fail(function(b,c){a.send("loading-failed"),"redirect"===b&&c&&a.previewUrl(c),"logged out"===b&&(a.preview&&(a.preview.destroy(),delete a.preview),a.login().done(a.refresh)),"cheatin"===b&&a.cheatin()})},login:function(){var a,c,d,f=this;return this._login?this._login:(a=b.Deferred(),this._login=a.promise(),c=new e.Messenger({channel:"login",url:e.settings.url.login}),d=b("<iframe />",{src:e.settings.url.login,title:e.l10n.loginIframeTitle}).appendTo(this.container),c.targetWindow(d[0].contentWindow),c.bind("login",function(){d.remove(),c.destroy(),delete f._login,a.resolve()}),this._login)},cheatin:function(){b(document.body).empty().addClass("cheatin").append("<p>"+e.l10n.cheatin+"</p>")}}),e.controlConstructor={color:e.ColorControl,media:e.MediaControl,upload:e.UploadControl,image:e.ImageControl,header:e.HeaderControl,background:e.BackgroundControl,theme:e.ThemeControl},e.panelConstructor={},e.sectionConstructor={themes:e.ThemesSection},b(function(){if(e.settings=window._wpCustomizeSettings,e.l10n=window._wpCustomizeControlsL10n,e.settings){if(!b.support.postMessage||!b.support.cors&&e.settings.isCrossDomain)return window.location=e.settings.url.fallback;var a,c,d=b(document.body),f=d.children(".wp-full-overlay"),g=b("#customize-info .theme-name.site-title"),h=b(".customize-controls-close"),i=b("#save");b("#customize-controls").on("keydown",function(a){var c=13===a.which,d=b(a.target);c&&(d.is("input:not([type=button])")||d.is("select"))&&a.preventDefault()}),b("#customize-info").find("> .accordion-section-title").on("click keydown",function(a){if(!e.utils.isKeydownButNotEnterEvent(a)){a.preventDefault();var c=b(this).parent(),d=c.find(".accordion-section-content:first");c.hasClass("cannot-expand")||(c.hasClass("open")?(c.toggleClass("open"),d.slideUp(e.Panel.prototype.defaultExpandedArguments.duration)):(d.slideDown(e.Panel.prototype.defaultExpandedArguments.duration),c.toggleClass("open")))}}),e.previewer=new e.Previewer({container:"#customize-preview",form:"#customize-controls",previewUrl:e.settings.url.preview,allowedUrls:e.settings.url.allowed,signature:"WP_CUSTOMIZER_SIGNATURE"},{nonce:e.settings.nonce,query:function(){var a={};return e.each(function(b,c){b._dirty&&(a[c]=b())}),{wp_customize:"on",theme:e.settings.theme.stylesheet,customized:JSON.stringify(a),nonce:this.nonce.preview}},save:function(){var a,c,f=this,g=b.extend(this.query(),{nonce:this.nonce.save}),h=e.state("processing");d.addClass("saving"),c=function(){var a=wp.ajax.post("customize_save",g);e.trigger("save",a),a.always(function(){d.removeClass("saving")}),a.fail(function(a){"0"===a?a="not_logged_in":"-1"===a&&(a="invalid_nonce"),"invalid_nonce"===a?f.cheatin():"not_logged_in"===a&&(f.preview.iframe.hide(),f.login().done(function(){f.save(),f.preview.iframe.show()})),e.trigger("error",a)}),a.done(function(a){e.each(function(a){a._dirty=!1}),e.trigger("saved",a)})},0===h()?c():(a=function(){0===h()&&(e.state.unbind("change",a),c())},e.state.bind("change",a))}}),e.previewer.bind("nonce",function(a){b.extend(this.nonce,a)}),b.each(e.settings.settings,function(a,b){e.create(a,a,b.value,{transport:b.transport,previewer:e.previewer})}),b.each(e.settings.panels,function(a,b){var c,d=e.panelConstructor[b.type]||e.Panel;c=new d(a,{params:b}),e.panel.add(a,c)}),b.each(e.settings.sections,function(a,b){var c,d=e.sectionConstructor[b.type]||e.Section;c=new d(a,{params:b}),e.section.add(a,c)}),b.each(e.settings.controls,function(a,b){var c,d=e.controlConstructor[b.type]||e.Control;c=new d(a,{params:b,previewer:e.previewer}),e.control.add(a,c)}),_.each(["panel","section","control"],function(a){var b,c=e.settings.autofocus[a];c&&e[a](c)&&(b=e[a](c),b.deferred.embedded.done(function(){e.previewer.deferred.active.done(function(){b.focus()})}))}),e.reflowPaneContents=_.bind(function(){var a,c,d,f=[],g=!1;document.activeElement&&(c=b(document.activeElement)),e.panel.each(function(b){var c=b.sections(),d=_.pluck(c,"container");f.push(b),a=b.container.find("ul:first"),e.utils.areElementListsEqual(d,a.children("[id]"))||(_(c).each(function(b){a.append(b.container)}),g=!0)}),e.section.each(function(b){var c=b.controls(),d=_.pluck(c,"container");b.panel()||f.push(b),a=b.container.find("ul:first"),e.utils.areElementListsEqual(d,a.children("[id]"))||(_(c).each(function(b){a.append(b.container)}),g=!0)}),f.sort(e.utils.prioritySort),d=_.pluck(f,"container"),a=b("#customize-theme-controls").children("ul"),e.utils.areElementListsEqual(d,a.children())||(_(f).each(function(b){a.append(b.container)}),g=!0),e.panel.each(function(a){var b=a.active();a.active.callbacks.fireWith(a.active,[b,b])}),e.section.each(function(a){var b=a.active();a.active.callbacks.fireWith(a.active,[b,b])}),g&&c&&c.focus()},e),e.bind("ready",e.reflowPaneContents),e.reflowPaneContents=_.debounce(e.reflowPaneContents,100),b([e.panel,e.section,e.control]).each(function(a,b){b.bind("add",e.reflowPaneContents),b.bind("change",e.reflowPaneContents),b.bind("remove",e.reflowPaneContents)}),e.previewer.previewUrl()?e.previewer.refresh():e.previewer.previewUrl(e.settings.url.home),function(){var a=new e.Values,b=a.create("saved"),c=a.create("activated"),d=a.create("processing");a.bind("change",function(){c()?b()?(i.val(e.l10n.saved).prop("disabled",!0),h.find(".screen-reader-text").text(e.l10n.close)):(i.val(e.l10n.save).prop("disabled",!1),h.find(".screen-reader-text").text(e.l10n.cancel)):(i.val(e.l10n.activate).prop("disabled",!1),h.find(".screen-reader-text").text(e.l10n.cancel))}),b(!0),c(e.settings.theme.active),d(0),e.bind("change",function(){a("saved").set(!1)}),e.bind("saved",function(){a("saved").set(!0),a("activated").set(!0)}),c.bind(function(a){a&&e.trigger("activated")}),e.state=a}(),i.click(function(a){e.previewer.save(),a.preventDefault()}).keydown(function(a){9!==a.which&&(13===a.which&&e.previewer.save(),a.preventDefault())}),b("#customize-header-actions").on("click keydown",".control-panel-back",function(a){e.utils.isKeydownButNotEnterEvent(a)||(a.preventDefault(),e.panel.each(function(a){a.collapse()}))}),h.keydown(function(a){9!==a.which&&(13===a.which&&this.click(),a.preventDefault())}),b(".collapse-sidebar").on("click keydown",function(a){e.utils.isKeydownButNotEnterEvent(a)||(f.toggleClass("collapsed").toggleClass("expanded"),a.preventDefault())}),b(".customize-controls-preview-toggle").on("click keydown",function(a){e.utils.isKeydownButNotEnterEvent(a)||(f.toggleClass("preview-only"),a.preventDefault())
 }),g.length&&b("#customize-control-blogname input").on("input",function(){g.text(this.value)}),a=new e.Messenger({url:e.settings.url.parent,channel:"loader"}),a.bind("back",function(){h.on("click.customize-controls-close",function(b){b.preventDefault(),a.send("close")})}),b(window).on("beforeunload",function(){return e.state("saved")()?void 0:(setTimeout(function(){f.removeClass("customize-loading")},1),e.l10n.saveAlert)}),b.each(["saved","change"],function(b,c){e.bind(c,function(){a.send(c)})}),e.bind("activated",function(){a.targetWindow()?a.send("activated",e.settings.url.activated):e.settings.url.activated&&(window.location=e.settings.url.activated)}),a.send("ready"),b.each({background_image:{controls:["background_repeat","background_position_x","background_attachment"],callback:function(a){return!!a}},show_on_front:{controls:["page_on_front","page_for_posts"],callback:function(a){return"page"===a}},header_textcolor:{controls:["header_textcolor"],callback:function(a){return"blank"!==a}}},function(a,c){e(a,function(a){b.each(c.controls,function(b,d){e.control(d,function(b){var d=function(a){b.container.toggle(c.callback(a))};d(a.get()),a.bind(d)})})})}),e.control("display_header_text",function(a){var b="";a.elements[0].unsync(e("header_textcolor")),a.element=new e.Element(a.container.find("input")),a.element.set("blank"!==a.setting()),a.element.bind(function(c){c||(b=e("header_textcolor").get()),a.setting.set(c?b:"blank")}),a.setting.bind(function(b){a.element.set("blank"!==b)})}),e.trigger("ready"),c=h,c.focus(),setTimeout(function(){c.focus()},200)}})}(wp,jQuery);
\ No newline at end of file
diff --git a/wp-admin/theme-install.php b/wp-admin/theme-install.php
index 0443ba854e..73e343a9a9 100644
--- a/wp-admin/theme-install.php
+++ b/wp-admin/theme-install.php
@@ -260,7 +260,7 @@ if ( $tab ) {
 		</div>
 	</div>
 	<div class="wp-full-overlay-main">
-		<iframe src="{{ data.preview_url }}" />
+		<iframe src="{{ data.preview_url }}" title="<?php esc_attr_e( 'Preview' ); ?>" />
 	</div>
 </script>
 
diff --git a/wp-includes/js/customize-loader.js b/wp-includes/js/customize-loader.js
index 07f21966a9..02ddc67bab 100644
--- a/wp-includes/js/customize-loader.js
+++ b/wp-includes/js/customize-loader.js
@@ -114,7 +114,7 @@ window.wp = window.wp || {};
 			// Dirty state of Customizer in iframe
 			this.saved = new api.Value( true );
 
-			this.iframe = $( '<iframe />', { src: src }).appendTo( this.element );
+			this.iframe = $( '<iframe />', { 'src': src, 'title': Loader.settings.l10n.mainIframeTitle } ).appendTo( this.element );
 			this.iframe.one( 'load', this.loaded );
 
 			// Create a postMessage connection with the iframe.
diff --git a/wp-includes/js/customize-loader.min.js b/wp-includes/js/customize-loader.min.js
index f9f03b7a8a..ab87c34c5a 100644
--- a/wp-includes/js/customize-loader.min.js
+++ b/wp-includes/js/customize-loader.min.js
@@ -1 +1 @@
-window.wp=window.wp||{},function(a,b){var c,d=wp.customize;b.extend(b.support,{history:!(!window.history||!history.pushState),hashchange:"onhashchange"in window&&(void 0===document.documentMode||document.documentMode>7)}),c=b.extend({},d.Events,{initialize:function(){this.body=b(document.body),c.settings&&b.support.postMessage&&(b.support.cors||!c.settings.isCrossDomain)&&(this.window=b(window),this.element=b('<div id="customize-container" />').appendTo(this.body),this.bind("open",this.overlay.show),this.bind("close",this.overlay.hide),b("#wpbody").on("click",".load-customize",function(a){a.preventDefault(),c.link=b(this),c.open(c.link.attr("href"))}),b.support.history&&this.window.on("popstate",c.popstate),b.support.hashchange&&(this.window.on("hashchange",c.hashchange),this.window.triggerHandler("hashchange")))},popstate:function(a){var b=a.originalEvent.state;b&&b.customize?c.open(b.customize):c.active&&c.close()},hashchange:function(){var a=window.location.toString().split("#")[1];a&&0===a.indexOf("wp_customize=on")&&c.open(c.settings.url+"?"+a),a||b.support.history||c.close()},beforeunload:function(){return c.saved()?void 0:c.settings.l10n.saveAlert},open:function(a){if(!this.active){if(c.settings.browser.mobile)return window.location=a;this.originalDocumentTitle=document.title,this.active=!0,this.body.addClass("customize-loading"),this.saved=new d.Value(!0),this.iframe=b("<iframe />",{src:a}).appendTo(this.element),this.iframe.one("load",this.loaded),this.messenger=new d.Messenger({url:a,channel:"loader",targetWindow:this.iframe[0].contentWindow}),this.messenger.bind("ready",function(){c.messenger.send("back")}),this.messenger.bind("close",function(){b.support.history?history.back():b.support.hashchange?window.location.hash="":c.close()}),b(window).on("beforeunload",this.beforeunload),this.messenger.bind("activated",function(a){a&&(window.location=a)}),this.messenger.bind("saved",function(){c.saved(!0)}),this.messenger.bind("change",function(){c.saved(!1)}),this.pushState(a),this.trigger("open")}},pushState:function(a){var c=a.split("?")[1];b.support.history&&window.location.href!==a?history.pushState({customize:a},"",a):!b.support.history&&b.support.hashchange&&c&&(window.location.hash="wp_customize=on&"+c),this.trigger("open")},opened:function(){c.body.addClass("customize-active full-overlay-active")},close:function(){if(this.active){if(!this.saved()&&!confirm(c.settings.l10n.saveAlert))return void history.forward();this.active=!1,this.trigger("close"),this.originalDocumentTitle&&(document.title=this.originalDocumentTitle),this.link&&this.link.focus()}},closed:function(){c.iframe.remove(),c.messenger.destroy(),c.iframe=null,c.messenger=null,c.saved=null,c.body.removeClass("customize-active full-overlay-active").removeClass("customize-loading"),b(window).off("beforeunload",c.beforeunload)},loaded:function(){c.body.removeClass("customize-loading")},overlay:{show:function(){this.element.fadeIn(200,c.opened)},hide:function(){this.element.fadeOut(200,c.closed)}}}),b(function(){c.settings=_wpCustomizeLoaderSettings,c.initialize()}),d.Loader=c}(wp,jQuery);
\ No newline at end of file
+window.wp=window.wp||{},function(a,b){var c,d=wp.customize;b.extend(b.support,{history:!(!window.history||!history.pushState),hashchange:"onhashchange"in window&&(void 0===document.documentMode||document.documentMode>7)}),c=b.extend({},d.Events,{initialize:function(){this.body=b(document.body),c.settings&&b.support.postMessage&&(b.support.cors||!c.settings.isCrossDomain)&&(this.window=b(window),this.element=b('<div id="customize-container" />').appendTo(this.body),this.bind("open",this.overlay.show),this.bind("close",this.overlay.hide),b("#wpbody").on("click",".load-customize",function(a){a.preventDefault(),c.link=b(this),c.open(c.link.attr("href"))}),b.support.history&&this.window.on("popstate",c.popstate),b.support.hashchange&&(this.window.on("hashchange",c.hashchange),this.window.triggerHandler("hashchange")))},popstate:function(a){var b=a.originalEvent.state;b&&b.customize?c.open(b.customize):c.active&&c.close()},hashchange:function(){var a=window.location.toString().split("#")[1];a&&0===a.indexOf("wp_customize=on")&&c.open(c.settings.url+"?"+a),a||b.support.history||c.close()},beforeunload:function(){return c.saved()?void 0:c.settings.l10n.saveAlert},open:function(a){if(!this.active){if(c.settings.browser.mobile)return window.location=a;this.originalDocumentTitle=document.title,this.active=!0,this.body.addClass("customize-loading"),this.saved=new d.Value(!0),this.iframe=b("<iframe />",{src:a,title:c.settings.l10n.mainIframeTitle}).appendTo(this.element),this.iframe.one("load",this.loaded),this.messenger=new d.Messenger({url:a,channel:"loader",targetWindow:this.iframe[0].contentWindow}),this.messenger.bind("ready",function(){c.messenger.send("back")}),this.messenger.bind("close",function(){b.support.history?history.back():b.support.hashchange?window.location.hash="":c.close()}),b(window).on("beforeunload",this.beforeunload),this.messenger.bind("activated",function(a){a&&(window.location=a)}),this.messenger.bind("saved",function(){c.saved(!0)}),this.messenger.bind("change",function(){c.saved(!1)}),this.pushState(a),this.trigger("open")}},pushState:function(a){var c=a.split("?")[1];b.support.history&&window.location.href!==a?history.pushState({customize:a},"",a):!b.support.history&&b.support.hashchange&&c&&(window.location.hash="wp_customize=on&"+c),this.trigger("open")},opened:function(){c.body.addClass("customize-active full-overlay-active")},close:function(){if(this.active){if(!this.saved()&&!confirm(c.settings.l10n.saveAlert))return void history.forward();this.active=!1,this.trigger("close"),this.originalDocumentTitle&&(document.title=this.originalDocumentTitle),this.link&&this.link.focus()}},closed:function(){c.iframe.remove(),c.messenger.destroy(),c.iframe=null,c.messenger=null,c.saved=null,c.body.removeClass("customize-active full-overlay-active").removeClass("customize-loading"),b(window).off("beforeunload",c.beforeunload)},loaded:function(){c.body.removeClass("customize-loading")},overlay:{show:function(){this.element.fadeIn(200,c.opened)},hide:function(){this.element.fadeOut(200,c.closed)}}}),b(function(){c.settings=_wpCustomizeLoaderSettings,c.initialize()}),d.Loader=c}(wp,jQuery);
\ No newline at end of file
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 2c5fa809c3..97fb68183f 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -389,13 +389,15 @@ function wp_default_scripts( &$scripts ) {
 	$scripts->add( 'customize-views',    "/wp-includes/js/customize-views.js",  array( 'jquery', 'underscore', 'imgareaselect', 'customize-models' ), false, 1 );
 	$scripts->add( 'customize-controls', "/wp-admin/js/customize-controls$suffix.js", array( 'customize-base' ), false, 1 );
 	did_action( 'init' ) && $scripts->localize( 'customize-controls', '_wpCustomizeControlsL10n', array(
-		'activate'  => __( 'Save &amp; Activate' ),
-		'save'      => __( 'Save &amp; Publish' ),
-		'saveAlert' => __( 'The changes you made will be lost if you navigate away from this page.' ),
-		'saved'     => __( 'Saved' ),
-		'cancel'    => __( 'Cancel' ),
-		'close'     => __( 'Close' ),
-		'cheatin'   => __( 'Cheatin&#8217; uh?' ),
+		'activate'           => __( 'Save &amp; Activate' ),
+		'save'               => __( 'Save &amp; Publish' ),
+		'saveAlert'          => __( 'The changes you made will be lost if you navigate away from this page.' ),
+		'saved'              => __( 'Saved' ),
+		'cancel'             => __( 'Cancel' ),
+		'close'              => __( 'Close' ),
+		'cheatin'            => __( 'Cheatin&#8217; uh?' ),
+		'previewIframeTitle' => __( 'Site Preview' ),
+		'loginIframeTitle'   => __( 'Session expired' ),
 
 		// Used for overriding the file types allowed in plupload.
 		'allowedFiles' => __( 'Allowed Files' ),
diff --git a/wp-includes/theme.php b/wp-includes/theme.php
index d2eb765edf..ac52fba757 100644
--- a/wp-includes/theme.php
+++ b/wp-includes/theme.php
@@ -1963,7 +1963,8 @@ function _wp_customize_loader_settings() {
 		'isCrossDomain' => $cross_domain,
 		'browser'       => $browser,
 		'l10n'          => array(
-			'saveAlert' => __( 'The changes you made will be lost if you navigate away from this page.' ),
+			'saveAlert'       => __( 'The changes you made will be lost if you navigate away from this page.' ),
+			'mainIframeTitle' => __( 'Customizer' ),
 		),
 	);
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 7c52644448..3fb0dde5c4 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31703';
+$wp_version = '4.2-alpha-31704';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.