[Media Router] Use DialMediaSinkService in MediaRouterMojoImpl

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 f1c657680314510c0ed740c22ce65c529ea58093..cf627934aedf56892d107d35b446bd677411c94b 100644
--- a/chrome/common/media_router/mojo/media_router.mojom
+++ b/chrome/common/media_router/mojo/media_router.mojom
@@ -187,6 +187,15 @@ enum RouteRequestResultCode {
 // New values must be added here.
 };
 
+// Pass feature flags from browser to Media Route Provider

[Kevin M, 2017/05/03 21:07:28]

Used to pass feature configuration data from the Browser to the Media Route
Provider.

[zhaobin, 2017/05/04 23:52:36]

Done.

+struct MediaRouteProviderConfig {
+  // If the MRP should enable DIAL discovery in component extension.

[Kevin M, 2017/05/03 21:07:28]

Nit: It seems like the component extension part is already implied by the "MRP"
subject in this sentence. Remove that part?

[zhaobin, 2017/05/04 23:52:36]

Done.

+  bool enable_dial_discovery;
+
+  // If the MRP should enable Cast discovery in component extension.
+  bool enable_cast_discovery;
+};
+
 // Modeled after the MediaRouter interface defined in
 // chrome/browser/media/router/media_router.h
 interface MediaRouteProvider {
@@ -423,7 +432,7 @@ interface MediaRouter {
   // Returns a string that uniquely identifies the Media Router browser
   // process.
   RegisterMediaRouteProvider(MediaRouteProvider media_router_provider) =>
-      (string instance_id);
+      (string instance_id, MediaRouteProviderConfig config);
 
   // Called when the Media Route Manager receives a new list of |sinks|
   // compatible with |media_source|. The result is only valid for |origins|. If