[Media Router] Add a presentation id to MediaRoute mapping in the MR

chrome/browser/media/router/mock_media_router.h

Index: chrome/browser/media/router/mock_media_router.h
diff --git a/chrome/browser/media/router/mock_media_router.h b/chrome/browser/media/router/mock_media_router.h
index 5fe951bdc5edca876ab4cfdeb1536b96e52396fd..faa174b0576427a11079c881e76c4f639cf4dc56 100644
--- a/chrome/browser/media/router/mock_media_router.h
+++ b/chrome/browser/media/router/mock_media_router.h
@@ -87,6 +87,13 @@ class MockMediaRouter : public MediaRouterBase {
     return connection_state_callbacks_.Add(callback);
   }
   MOCK_CONST_METHOD0(GetCurrentRoutes, std::vector<MediaRoute>());
+  MOCK_METHOD2(RegisterPresentationRoute,
+               void(const std::string& presentation_id,
+                    const MediaRoute& route));
+  MOCK_METHOD1(UnregisterPresentationRoute,
+               void(const std::string& presentation_id));
+  MOCK_CONST_METHOD1(GetPresentationRoute,
+                     const MediaRoute*(const std::string& presentation_id));
 
   MOCK_METHOD0(OnIncognitoProfileShutdown, void());
   MOCK_METHOD1(OnAddPresentationConnectionStateChangedCallbackInvoked,