[Media Router] Support dual discovery

chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h

Index: chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h
diff --git a/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h b/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h
index b11bad149255a7ddd472059cb840281f16c48cdf..094b0d20124944620edf938a4ddb1440261a5e09 100644
--- a/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h
+++ b/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h
@@ -25,6 +25,7 @@ class URLRequestContextGetter;
 namespace media_router {
 
 class DialMediaSinkServiceImpl;
+class DialMediaSinkServiceDelegate;
 
 // A wrapper class of DialMediaSinkService handling thread hopping between UI
 // and IO threads. This class is thread safe. Public APIs should be invoked on
@@ -50,6 +51,9 @@ class DialMediaSinkServiceProxy
   // Start() is cleared.
   void Stop() override;
 
+  void SetDialMediaSinkServiceDelegate(
+      scoped_refptr<DialMediaSinkServiceDelegate> delegate);
+
   void SetDialMediaSinkServiceForTest(
       std::unique_ptr<DialMediaSinkServiceImpl> dial_media_sink_service);
 
@@ -75,6 +79,8 @@ class DialMediaSinkServiceProxy
  private:
   std::unique_ptr<DialMediaSinkServiceImpl> dial_media_sink_service_;
 
+  scoped_refptr<DialMediaSinkServiceDelegate> delegate_;
+
   scoped_refptr<net::URLRequestContextGetter> request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(DialMediaSinkServiceProxy);