[Media Router] Add ProvideSinks() Mojo API

chrome/browser/media/router/mojo/media_router_mojo_impl.h

Index: chrome/browser/media/router/mojo/media_router_mojo_impl.h
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_impl.h b/chrome/browser/media/router/mojo/media_router_mojo_impl.h
index 5c77cd4dbb20b9528feb9e87ec874ffe5aace5fb..2f335159154852d92091dbe1f6cef2d7d715de01 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_impl.h
+++ b/chrome/browser/media/router/mojo/media_router_mojo_impl.h
@@ -107,6 +107,7 @@ class MediaRouterMojoImpl : public MediaRouterBase,
       const std::string& search_input,
       const std::string& domain,
       const MediaSinkSearchResponseCallback& sink_callback) override;
+  void OnSinksDiscovered(std::unique_ptr<MediaSinkList> sinks) override;
 
   const std::string& media_route_provider_extension_id() const {
     return media_route_provider_extension_id_;
@@ -275,6 +276,8 @@ class MediaRouterMojoImpl : public MediaRouterBase,
       const std::string& domain,
       const MediaSinkSearchResponseCallback& sink_callback);
 
+  void DoOnSinksDiscovered(std::unique_ptr<MediaSinkList> sinks);
+
   // Error handler callback for |binding_| and |media_route_provider_|.
   void OnConnectionError();