Motown: Define MediaRenderer and make it the way we identify renderers.

services/media/factory_service/media_timeline_controller_impl.h

 // Copyright 2016 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.
 
 #ifndef MOJO_SERVICES_MEDIA_FACTORY_TIMELINE_CONTROLLER_IMPL_H_
 #define MOJO_SERVICES_MEDIA_FACTORY_TIMELINE_CONTROLLER_IMPL_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 46 matching lines @@
       const SetTimelineTransformCallback& callback) override;
 
  private:
   static constexpr int64_t kDefaultLeadTime = Timeline::ns_from_ms(30);
 
   // Relationship to subordinate control site.
   struct SiteState {
     SiteState(MediaTimelineControllerImpl* parent,
               MediaTimelineControlSitePtr site);
 
-    SiteState(SiteState&& other);
-
     ~SiteState();
 
     void HandleStatusUpdates(
         uint64_t version = MediaTimelineControlSite::kInitialStatus,
         MediaTimelineControlSiteStatusPtr status = nullptr);
 
     MediaTimelineControllerImpl* parent_;
     MediaTimelineControlSitePtr site_;
     TimelineConsumerPtr consumer_;
     bool end_of_stream_ = false;
@@ skipping 63 matching lines @@
 
   MediaTimelineControllerImpl(InterfaceRequest<MediaTimelineController> request,
                               MediaFactoryService* owner);
 
   // Takes action when a site changes its end-of-stream value.
   void HandleSiteEndOfStreamChange();
 
   Binding<MediaTimelineControlSite> control_site_binding_;
   Binding<TimelineConsumer> consumer_binding_;
   MojoPublisher<GetStatusCallback> status_publisher_;
-  std::vector<SiteState> site_states_;
+  std::vector<std::unique_ptr<SiteState>> site_states_;
   TimelineFunction current_timeline_function_;
   bool end_of_stream_ = false;
   std::weak_ptr<TimelineTransition> pending_transition_;
 };
 
 }  // namespace media
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_MEDIA_FACTORY_TIMELINE_CONTROLLER_IMPL_H_