[Media Router] Add DialMediaSinkService and DeviceDescriptionService

chrome/common/media_router/discovery/media_sink_internal.cc

Index: chrome/common/media_router/discovery/media_sink_internal.cc
diff --git a/chrome/common/media_router/discovery/media_sink_internal.cc b/chrome/common/media_router/discovery/media_sink_internal.cc
index 3b9a77fc89f9b591da57e84819214e5285355998..0cab52e6c67ec6b50f39863e5d4e9981b8d69510 100644
--- a/chrome/common/media_router/discovery/media_sink_internal.cc
+++ b/chrome/common/media_router/discovery/media_sink_internal.cc
@@ -64,6 +64,14 @@ bool MediaSinkInternal::operator==(const MediaSinkInternal& other) const {
   return false;
 }
 
+bool MediaSinkInternal::operator!=(const MediaSinkInternal& other) const {
+  return !operator==(other);
+}
+
+bool MediaSinkInternal::operator<(const MediaSinkInternal& other) const {
+  return sink_.id() < other.sink().id();
+}
+
 void MediaSinkInternal::set_sink(const MediaSink& sink) {
   sink_ = sink;
 }