fix(router): export navigation extras

modules/@angular/router/index.ts

@@ -13,7 +13,7 @@ export {RouterLink, RouterLinkWithHref} from './src/directives/router_link';
 export {RouterLinkActive} from './src/directives/router_link_active';
 export {RouterOutlet} from './src/directives/router_outlet';
 export {CanActivate, CanActivateChild, CanDeactivate, Resolve} from './src/interfaces';
-export {Event, NavigationCancel, NavigationEnd, NavigationError, NavigationStart, Router, RoutesRecognized} from './src/router';
+export {Event, NavigationCancel, NavigationEnd, NavigationError, NavigationExtras, NavigationStart, Router, RoutesRecognized} from './src/router';
 export {ROUTER_DIRECTIVES, RouterModule} from './src/router_module';
 export {RouterOutletMap} from './src/router_outlet_map';
 export {provideRouter} from './src/router_providers';

modules/@angular/router/src/directives/router_outlet.ts

@@ -6,13 +6,14 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {Attribute, ComponentFactory, ComponentFactoryResolver, ComponentRef, Directive, EventEmitter, NoComponentFactoryError, Output, ReflectiveInjector, ResolvedReflectiveProvider, ViewContainerRef, Injector} from '@angular/core';
+import {Attribute, ComponentFactory, ComponentFactoryResolver, ComponentRef, Directive, EventEmitter, Injector, NoComponentFactoryError, Output, ReflectiveInjector, ResolvedReflectiveProvider, ViewContainerRef} from '@angular/core';
 
 import {RouterOutletMap} from '../router_outlet_map';
 import {ActivatedRoute} from '../router_state';
 import {PRIMARY_OUTLET} from '../shared';
 
 
+
 /**
  * A router outlet is a placeholder that Angular dynamically fills based on the application's route.
  *

modules/@angular/router/src/router.ts

@@ -38,6 +38,9 @@ import {TreeNode} from './utils/tree';
 
 declare var Zone: any;
 
+/**
+ * @experimental
+ */
 export interface NavigationExtras {
   relativeTo?: ActivatedRoute;
   queryParams?: Params;

tools/public_api_guard/router/index.d.ts

@@ -79,6 +79,13 @@ export declare class NavigationError {
     toString(): string;
 }
 
+/** @experimental */
+export interface NavigationExtras {
+    fragment?: string;
+    queryParams?: Params;
+    relativeTo?: ActivatedRoute;
+}
+
 /** @stable */
 export declare class NavigationStart {
     id: number;