[Media Router] Add ProvideSinks() Mojo API

chrome/browser/media/router/discovery/media_sink_internal.h

Index: chrome/browser/media/router/discovery/media_sink_internal.h
diff --git a/chrome/browser/media/router/discovery/media_sink_internal.h b/chrome/browser/media/router/discovery/media_sink_internal.h
index 331ab4e6893846f25078f2c8bad7ee3f25387960..296f9f5dfd5a3cce142953b5670d163f0e667e9a 100644
--- a/chrome/browser/media/router/discovery/media_sink_internal.h
+++ b/chrome/browser/media/router/discovery/media_sink_internal.h
@@ -24,6 +24,8 @@ struct DialSinkExtraData {
   DialSinkExtraData();
   DialSinkExtraData(const DialSinkExtraData& other);
   ~DialSinkExtraData();
+
+  bool operator==(const DialSinkExtraData& other) const;
 };
 
 // Extra data for cast media sink.
@@ -45,6 +47,8 @@ struct CastSinkExtraData {
   CastSinkExtraData();
   CastSinkExtraData(const CastSinkExtraData& other);
   ~CastSinkExtraData();
+
+  bool operator==(const CastSinkExtraData& other) const;
 };
 
 // Represents a media sink discovered by MediaSinkService. It is used by
@@ -69,6 +73,8 @@ class MediaSinkInternal {
 
   MediaSinkInternal& operator=(const MediaSinkInternal& other);
 
+  bool operator==(const MediaSinkInternal& other) const;
+
   void set_sink(const MediaSink& sink);
   const MediaSink& sink() const { return sink_; }