Pass origin to StartObservingMediaSinks.

chrome/browser/media/router/test_helper.h

Index: chrome/browser/media/router/test_helper.h
diff --git a/chrome/browser/media/router/test_helper.h b/chrome/browser/media/router/test_helper.h
index 066e6e19af07d98878ba2489715dc436bb5fc06d..01452d8727dfd8516594043347424348242abb95 100644
--- a/chrome/browser/media/router/test_helper.h
+++ b/chrome/browser/media/router/test_helper.h
@@ -110,7 +110,8 @@ class MockMediaRouteProvider : public interfaces::MediaRouteProvider {
                     const JoinRouteCallback& callback));
   MOCK_METHOD1(DetachRoute, void(const mojo::String& route_id));
   MOCK_METHOD1(TerminateRoute, void(const mojo::String& route_id));
-  MOCK_METHOD1(StartObservingMediaSinks, void(const mojo::String& source));
+  MOCK_METHOD2(StartObservingMediaSinks,
+               void(const mojo::String& source, const mojo::String& origin));
   MOCK_METHOD1(StopObservingMediaSinks, void(const mojo::String& source));
   MOCK_METHOD3(SendRouteMessage,
                void(const mojo::String& media_route_id,
@@ -142,7 +143,9 @@ class MockMediaRouteProvider : public interfaces::MediaRouteProvider {
 
 class MockMediaSinksObserver : public MediaSinksObserver {
  public:
-  MockMediaSinksObserver(MediaRouter* router, const MediaSource& source);
+  MockMediaSinksObserver(MediaRouter* router,
+                         const MediaSource& source,
+                         const GURL& origin);
   ~MockMediaSinksObserver() override;
 
   MOCK_METHOD1(OnSinksReceived, void(const std::vector<MediaSink>& sinks));