[Media Router] Add ProvideSinks() Mojo API

chrome/browser/media/router/media_sink.h

Index: chrome/browser/media/router/media_sink.h
diff --git a/chrome/browser/media/router/media_sink.h b/chrome/browser/media/router/media_sink.h
index f5ef6558041c59a0c3bdce21bcaf93c8e18880ab..81b965023745e57fb498e0abc37c9dffa5ad4ab1 100644
--- a/chrome/browser/media/router/media_sink.h
+++ b/chrome/browser/media/router/media_sink.h
@@ -63,6 +63,9 @@ class MediaSink {
   // This method only compares IDs.
   bool Equals(const MediaSink& other) const;
 
+  // This method compares all fields.
+  bool operator==(const MediaSink& other) const;
+
   // Compares |this| to |other| first by their icon types, then their names
   // using |collator|, and finally their IDs.
   bool CompareUsingCollator(const MediaSink& other,