Split SurfaceFactoryClient Into Four Interfaces

cc/test/stub_surface_factory_client.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_TEST_STUB_SURFACE_FACTORY_CLIENT_H_
+#define CC_TEST_STUB_SURFACE_FACTORY_CLIENT_H_
+
+#include "cc/surfaces/surface_factory_client.h"
+
+namespace cc {
+
+class StubSurfaceFactoryClient : public SurfaceFactoryClient {
+ public:
+  StubSurfaceFactoryClient() = default;
+  ~StubSurfaceFactoryClient() override = default;
+
+  void ReferencedSurfacesChanged(
+      const LocalSurfaceId& local_surface_id,
+      const std::vector<SurfaceId>* active_referenced_surfaces) override {}
+};
+
+}  // namespace cc
+
+#endif  //  CC_TEST_STUB_SURFACE_FACTORY_CLIENT_H_