Motown: Implement MediaTimelineController and use it.

services/media/factory_service/factory_service.cc

Index: services/media/factory_service/factory_service.cc
diff --git a/services/media/factory_service/factory_service.cc b/services/media/factory_service/factory_service.cc
index 94b4c9b0082f917173d52472d80f0fc2c30a20dc..5d87ad4723954c760d948ebfc4839870281edd0e 100644
--- a/services/media/factory_service/factory_service.cc
+++ b/services/media/factory_service/factory_service.cc
@@ -8,6 +8,7 @@
 #include "services/media/factory_service/media_player_impl.h"
 #include "services/media/factory_service/media_sink_impl.h"
 #include "services/media/factory_service/media_source_impl.h"
+#include "services/media/factory_service/media_timeline_controller_impl.h"
 #include "services/media/factory_service/network_reader_impl.h"
 
 namespace mojo {
@@ -64,5 +65,11 @@ void MediaFactoryService::CreateNetworkReader(
   AddProduct(NetworkReaderImpl::Create(url, reader.Pass(), this));
 }
 
+void MediaFactoryService::CreateTimelineController(
+    InterfaceRequest<MediaTimelineController> timeline_controller) {
+  AddProduct(
+      MediaTimelineControllerImpl::Create(timeline_controller.Pass(), this));
+}
+
 }  // namespace media
 }  // namespace mojo