Media Remoting: Add mojo interfaces between browser and extension.

chrome/common/media_router/mojo/media_router.mojom

Index: chrome/common/media_router/mojo/media_router.mojom
diff --git a/chrome/common/media_router/mojo/media_router.mojom b/chrome/common/media_router/mojo/media_router.mojom
index d339c5c7931f13aef17d31cd66ad78e49a299266..725f8e1176c598236be9ef3bb415ae4b9abb41a2 100644
--- a/chrome/common/media_router/mojo/media_router.mojom
+++ b/chrome/common/media_router/mojo/media_router.mojom
@@ -6,6 +6,7 @@ module media_router.mojom;
 
 import "chrome/common/media_router/mojo/media_controller.mojom";
 import "chrome/common/media_router/mojo/media_status.mojom";
+import "media/mojo/interfaces/mirror_service_remoting.mojom";
 import "mojo/common/time.mojom";
 import "net/interfaces/ip_address.mojom";
 import "url/mojo/origin.mojom";
@@ -471,4 +472,8 @@ interface MediaRouter {
   // |messages|: A non-empty list of messages received.
   OnRouteMessagesReceived(string route_id,
                           array<RouteMessage> messages);
+
+  // Called when a MediaRemoter is started.

[imcheng, 2017/06/22 01:13:27]

Could you provide a bit more info about this method, such as the meaning of the
parameters? If there are additional info elsewhere that provides context,
consider referring to them here.

[xjz, 2017/06/23 19:02:41]

Done.

+  OnMediaRemoterCreated(int32 tab_id, media.mojom.MirrorServiceRemoter remoter,
+      media.mojom.MirrorServiceRemotingSource& remoting_source);
 };