ui: Cleanup class/struct forward declarations

media/mojo/services/media_service_factory.h

Index: media/mojo/services/media_service_factory.h
diff --git a/media/mojo/services/media_service_factory.h b/media/mojo/services/media_service_factory.h
index 182072fcb125b9c958d7c2fc1ea8f62af4374038..8e89c20771090505c427d076a1f3c84b4165073a 100644
--- a/media/mojo/services/media_service_factory.h
+++ b/media/mojo/services/media_service_factory.h
@@ -17,11 +17,11 @@ namespace media {
 // platform. Uses the TestMojoMediaClient if |enable_test_mojo_media_client| is
 // true.
 std::unique_ptr<service_manager::Service> MEDIA_MOJO_EXPORT
-CreateMediaService(const base::Closure& quit_closure);
+CreateMediaService();
 
 // Creates a MediaService instance using the TestMojoMediaClient.
 std::unique_ptr<service_manager::Service> MEDIA_MOJO_EXPORT
-CreateMediaServiceForTesting(const base::Closure& quit_closure);
+CreateMediaServiceForTesting();
 
 }  // namespace media