TinyMCE: pad empty paragraphs with `<br>` in Chrome to stop it from inserting non-breaking spaces in them.

Props iseulde. Fixes #31255.
Built from https://develop.svn.wordpress.org/trunk@31878


git-svn-id: http://core.svn.wordpress.org/trunk@31857 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/tinymce/plugins/wordpress/plugin.js

@@ -394,8 +394,10 @@ tinymce.PluginManager.add( 'wordpress', function( editor ) {
 
 	// Remove spaces from empty paragraphs.
 	editor.on( 'BeforeSetContent', function( event ) {
+		var paragraph = tinymce.Env.webkit ? '<p><br /></p>' : '<p></p>';
+
 		if ( event.content ) {
-			event.content = event.content.replace( /<p>(?:&nbsp;|\u00a0|\uFEFF| )+<\/p>/gi, '<p></p>' );
+			event.content = event.content.replace( /<p>(?:&nbsp;|\u00a0|\uFEFF|\s)+<\/p>/gi, paragraph );
 		}
 	});
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-beta2-31877';
+$wp_version = '4.2-beta2-31878';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.