[Do not submit] D3DKMTWaitForVerticalBlankEvent VSync prototype

gpu/ipc/client/command_buffer_proxy_impl.cc

 // Copyright (c) 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.
 
 #include "gpu/ipc/client/command_buffer_proxy_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 317 matching lines @@
   CheckLock();
   swap_buffers_completion_callback_ = callback;
 }
 
 void CommandBufferProxyImpl::SetUpdateVSyncParametersCallback(
     const UpdateVSyncParametersCallback& callback) {
   CheckLock();
   update_vsync_parameters_completion_callback_ = callback;
 }
 
+void CommandBufferProxyImpl::EnableVSync(bool enabled) {
+  CheckLock();
+  base::AutoLock lock(last_state_lock_);
+  if (last_state_.error != gpu::error::kNoError)
+    return;
+
+  Send(new GpuCommandBufferMsg_EnableVSync(route_id_, enabled));
+}
+
 gpu::CommandBuffer::State CommandBufferProxyImpl::WaitForTokenInRange(
     int32_t start,
     int32_t end) {
   CheckLock();
   base::AutoLock lock(last_state_lock_);
   TRACE_EVENT2("gpu", "CommandBufferProxyImpl::WaitForToken", "start", start,
                "end", end);
   // Error needs to be checked in case the state was updated on another thread.
   // We need to make sure that the reentrant context loss callback is called so
   // that the share group is also lost before we return any error up the stack.
@@ skipping 598 matching lines @@
     return;
   channel_->FlushPendingStream(stream_id_);
   channel_->Send(new GpuChannelMsg_DestroyCommandBuffer(route_id_));
   channel_->RemoveRoute(route_id_);
   channel_ = nullptr;
   if (gpu_control_client_)
     gpu_control_client_->OnGpuControlLostContext();
 }
 
 }  // namespace gpu