cc: Add support for handling authoritative vsync interval

cc/test/fake_proxy.h

 // Copyright 2012 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_FAKE_PROXY_H_
 #define CC_TEST_FAKE_PROXY_H_
 
 #include "base/single_thread_task_runner.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/proxy.h"
@@ skipping 29 matching lines @@
   bool BeginMainFrameRequested() const override;
   bool CommitRequested() const override;
   void Start() override {}
   void Stop() override {}
   void ForceSerializeOnSwapBuffers() override {}
   size_t MaxPartialTextureUpdates() const override;
   bool SupportsImplScrolling() const override;
   void SetDebugState(const LayerTreeDebugState& debug_state) override {}
   bool MainFrameWillHappenForTesting() override;
   void SetChildrenNeedBeginFrames(bool children_need_begin_frames) override {}
+  void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval) override {
+  }
 
   virtual RendererCapabilities& GetRendererCapabilities();
   void SetMaxPartialTextureUpdates(size_t max);
 
  private:
   RendererCapabilities capabilities_;
   size_t max_partial_texture_updates_;
   LayerTreeHost* layer_tree_host_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PROXY_H_