Pass origin to StartObservingMediaSinks.

chrome/browser/media/router/media_source.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/media/router/media_source.h"
 
 #include <string>
 
 namespace media_router {
 
-MediaSource::MediaSource(const MediaSource::Id& source_id) : id_(source_id) {
+MediaSource::MediaSource(const MediaSource::Id& source_id) :
+  id_(source_id), origin_("") {
 }
 
 MediaSource::MediaSource() {
 }
 
 MediaSource::~MediaSource() {}
 
 MediaSource::Id MediaSource::id() const {
   return id_;
 }
 
+std::string MediaSource::origin() const {
+  return origin_;
+}
+
+void MediaSource::set_origin(std::string origin) {
+  origin_ = origin;
+}
+
+bool MediaSource::operator==(const MediaSource& other) const {
+  return Equals(other);
+}
+
+bool MediaSource::operator<(const MediaSource& other) const {
+  if (id_ == other.id()) {
+    return origin_ < other.origin();
+  } else {
+    return id_ < other.id();
+  }
+}
+
 bool MediaSource::Equals(const MediaSource& other) const {
-  return id_ == other.id();
+  return id_ == other.id() && origin_ == other.origin();
 }
 
 bool MediaSource::Empty() const {
   return id_.empty();
 }
 
 std::string MediaSource::ToString() const {
   return "MediaSource[" + id_ + "]";
 }
 
 }  // namespace media_router