Revert of [Media Router] Custom Controls 3 - add plumbing through MRUI and MRWebUIMessageHandler

chrome/browser/media/router/mojo/media_router_mojo_test.h

Index: chrome/browser/media/router/mojo/media_router_mojo_test.h
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_test.h b/chrome/browser/media/router/mojo/media_router_mojo_test.h
index 21935d7fbf1b6482daf38e24b1086aef76467e97..4149d41bb8d26e7ae8fcd4ab4af851a69cf55620 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_test.h
+++ b/chrome/browser/media/router/mojo/media_router_mojo_test.h
@@ -147,23 +147,6 @@
   mojo::Binding<mojom::MediaController> binding_;
 };
 
-class MockMediaRouteController : public MediaRouteController {
- public:
-  MockMediaRouteController(const MediaRoute::Id& route_id,
-                           mojom::MediaControllerPtr mojo_media_controller,
-                           MediaRouter* media_router);
-
-  MOCK_CONST_METHOD0(Play, void());
-  MOCK_CONST_METHOD0(Pause, void());
-  MOCK_CONST_METHOD1(Seek, void(base::TimeDelta time));
-  MOCK_CONST_METHOD1(SetMute, void(bool mute));
-  MOCK_CONST_METHOD1(SetVolume, void(float volume));
-
- protected:
-  // The dtor is protected because MockMediaRouteController is ref-counted.
-  ~MockMediaRouteController() override;
-};
-
 class MockMediaRouteControllerObserver : public MediaRouteController::Observer {
  public:
   MockMediaRouteControllerObserver(