fix(router): make the contstructor of the router service public

Author: vsavkin

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

@@ -56,7 +56,6 @@ import {UrlTree} from '../url_tree';
  */
 @Directive({selector: ':not(a)[routerLink]'})
 export class RouterLink {
-  @Input() target: string;
   private commands: any[] = [];
   @Input() queryParams: {[k: string]: any};
   @Input() fragment: string;
@@ -73,7 +72,7 @@ export class RouterLink {
   @Input()
   set routerLink(data: any[]|string) {
     if (Array.isArray(data)) {
-      this.commands = <any>data;
+      this.commands = data;
     } else {
       this.commands = [data];
     }
@@ -85,10 +84,6 @@ export class RouterLink {
       return true;
     }
 
-    if (typeof this.target === 'string' && this.target != '_self') {
-      return true;
-    }
-
     this.router.navigate(
         this.commands,
         {relativeTo: this.route, queryParams: this.queryParams, fragment: this.fragment});
@@ -122,7 +117,7 @@ export class RouterLinkWithHref implements OnChanges {
   @Input()
   set routerLink(data: any[]|string) {
     if (Array.isArray(data)) {
-      this.commands = <any>data;
+      this.commands = data;
     } else {
       this.commands = [data];
     }

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

@@ -125,7 +125,7 @@ export class Router {
   private config: RouterConfig;
 
   /**
-   * @internal
+   * Creates the router service.
    */
   constructor(
       private rootComponentType: Type, private resolver: ComponentResolver,

tools/public_api_guard/router/index.d.ts

@@ -114,6 +114,7 @@ export declare class Router {
     events: Observable<Event>;
     routerState: RouterState;
     url: string;
+    constructor(rootComponentType: Type, resolver: ComponentResolver, urlSerializer: UrlSerializer, outletMap: RouterOutletMap, location: Location, injector: Injector, config: RouterConfig);
     createUrlTree(commands: any[], {relativeTo, queryParams, fragment}?: NavigationExtras): UrlTree;
     navigate(commands: any[], extras?: NavigationExtras): Promise<boolean>;
     navigateByUrl(url: string | UrlTree): Promise<boolean>;