Route D3D VSync signal to Compositor

gpu/ipc/service/gpu_vsync_provider.h

 // Copyright (c) 2016 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 GPU_IPC_SERVICE_GPU_VSYNC_PROVIDER_H_
 #define GPU_IPC_SERVICE_GPU_VSYNC_PROVIDER_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 12 matching lines @@
   // The call is made on background thread to avoid increased latency due to
   // serializing callback invocation with other GPU tasks. The code that
   // implements the callback function is expected to handle that.
   using VSyncCallback = base::Callback<void(base::TimeTicks timestamp)>;
 
   ~GpuVSyncProvider();
 
   static std::unique_ptr<GpuVSyncProvider> Create(const VSyncCallback& callback,
                                                   SurfaceHandle surface_handle);
 
-  // Enable or disable VSync production.
-  void EnableVSync(bool enabled);
+  // Start or stop VSync production.
+  void SetNeedsVSync(bool needs_vsync);
 
  private:
 #if defined(OS_WIN)
   GpuVSyncProvider(const VSyncCallback& callback, SurfaceHandle surface_handle);
 
   std::unique_ptr<GpuVSyncWorker> vsync_worker_;
 #endif  // defined(OS_WIN)
 
   DISALLOW_COPY_AND_ASSIGN(GpuVSyncProvider);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_GPU_VSYNC_PROVIDER_H_