[Media Router] Add MediaSink subtypes

chrome/browser/media/router/media_sink.cc

Index: chrome/browser/media/router/media_sink.cc
diff --git a/chrome/browser/media/router/media_sink.cc b/chrome/browser/media/router/media_sink.cc
index 96864354a79fb293077637247966f33bd0384a23..213b0947dd1d6f1e51d65540e8a7946c4cc05cb6 100644
--- a/chrome/browser/media/router/media_sink.cc
+++ b/chrome/browser/media/router/media_sink.cc
@@ -25,6 +25,12 @@ bool MediaSink::Equals(const MediaSink& other) const {
   return sink_id_ == other.sink_id_;
 }
 
+bool MediaSink::operator==(const MediaSink& other) const {
+  return sink_id_ == other.sink_id_ && name_ == other.name_ &&
+         description_ == other.description_ && domain_ == other.domain_ &&
+         icon_type_ == other.icon_type_;
+}
+
 bool MediaSink::CompareUsingCollator(const MediaSink& other,
                                      const icu::Collator* collator) const {
   if (icon_type_ != other.icon_type_)