Mojo JS bindings: switch most usage of "connection"/"router" module to "bindings".

third_party/WebKit/LayoutTests/media/mediasession/mojo/resources/mediasessionservice-mock.js

 /*
  * mediasessionservice-mock contains a mock implementation of MediaSessionService.
  */
 
 "use strict";
 
 var MediaSessionAction;
 
 function mojoString16ToJS(mojoString16) {
   return String.fromCharCode.apply(null, mojoString16.data);
@@ skipping 23 matching lines @@
   var artwork = [];
   for (var i = 0; i < mojoMetadata.artwork.length; i++)
     artwork.push(mojoImageToJS(mojoMetadata.artwork[i]));
 
   return new MediaMetadata({title: title, artist: artist, album: album, artwork: artwork});
 }
 
 let mediaSessionServiceMock = loadMojoModules(
     'mediaSessionServiceMock',
     ['third_party/WebKit/public/platform/modules/mediasession/media_session.mojom',
-     'mojo/public/js/router',
+     'mojo/public/js/bindings',
     ]).then(mojo => {
-      let [mediaSessionService, router] = mojo.modules;
+      let [mediaSessionService, bindings] = mojo.modules;
 
       MediaSessionAction = mediaSessionService.MediaSessionAction;
 
       class MediaSessionServiceMock {
         constructor(interfaceProvider) {
           interfaceProvider.addInterfaceOverrideForTesting(
               mediaSessionService.MediaSessionService.name,
-              handle => this.connectMediaSessionService_(handle));
+              handle => this.bindingSet_.addBinding(this, handle));
           this.interfaceProvider_ = interfaceProvider;
           this.pendingResponse_ = null;
-        }
-
-        connectMediaSessionService_(handle) {
-          this.mediaSessionServiceStub_ = new mediaSessionService.MediaSessionService.stubClass(this);
-          this.mediaSessionServiceRouter_ = new router.Router(handle);
-          this.mediaSessionServiceRouter_.setIncomingReceiver(this.mediaSessionServiceStub_);
+          this.bindingSet_ = new bindings.BindingSet(
+              mediaSessionService.MediaSessionService);
         }
 
         setMetadata(metadata) {
           if (!!this.metadataCallback_)
             this.metadataCallback_(mojoMetadataToJS(metadata));
         }
 
         setMetadataCallback(callback) {
           this.metadataCallback_ = callback;
         }
@@ skipping 22 matching lines @@
           this.clientCallback_ = callback;
         }
 
         getClient() {
           return this.client_;
         }
       }
 
       return new MediaSessionServiceMock(mojo.frameInterfaces);
     });