[Media Router] Implement JoinRoute + update CreateRoute API.

chrome/browser/media/router/media_router_mojo_impl.h

Index: chrome/browser/media/router/media_router_mojo_impl.h
diff --git a/chrome/browser/media/router/media_router_mojo_impl.h b/chrome/browser/media/router/media_router_mojo_impl.h
index f3bd8e36cf3be186f53f9e8e7592c53b017d6b3f..8e842d62f20661d13c0143cfe22f83d9a9903728 100644
--- a/chrome/browser/media/router/media_router_mojo_impl.h
+++ b/chrome/browser/media/router/media_router_mojo_impl.h
@@ -61,7 +61,14 @@ class MediaRouterMojoImpl : public MediaRouter,
   // enqueued for later use if the extension is temporarily suspended.
   void CreateRoute(const MediaSource::Id& source_id,
                    const MediaSink::Id& sink_id,
+                   const GURL& origin,
+                   int tab_id,
                    const MediaRouteResponseCallback& callback) override;
+  void JoinRoute(const MediaSource::Id& source_id,
+                 const std::string& presentation_id,
+                 const GURL& origin,
+                 int tab_id,
+                 const MediaRouteResponseCallback& callback) override;
   void CloseRoute(const MediaRoute::Id& route_id) override;
   void PostMessage(const MediaRoute::Id& route_id,
                    const std::string& message) override;
@@ -109,13 +116,20 @@ class MediaRouterMojoImpl : public MediaRouter,
   // These calls invoke methods in the component extension via Mojo.
   void DoCreateRoute(const MediaSource::Id& source_id,
                      const MediaSink::Id& sink_id,
+                     const std::string& origin,
+                     int tab_id,
                      const MediaRouteResponseCallback& callback);
+  void DoJoinRoute(const MediaSource::Id& source_id,
+                   const std::string& presentation_id,
+                   const std::string& origin,
+                   int tab_id,
+                   const MediaRouteResponseCallback& callback);
   void DoCloseRoute(const MediaRoute::Id& route_id);
   void DoPostMessage(const MediaRoute::Id& route_id,
                      const std::string& message);
   void DoClearIssue(const Issue::Id& issue_id);
-  void DoStartObservingMediaSinks(const std::string& source_id);
-  void DoStopObservingMediaSinks(const std::string& source_id);
+  void DoStartObservingMediaSinks(const MediaSource::Id& source_id);
+  void DoStopObservingMediaSinks(const MediaSource::Id& source_id);
   void DoStartObservingMediaRoutes();
   void DoStopObservingMediaRoutes();
   void DoStartObservingIssues();