ui: Add libsync GLFence implementation.

content/child/child_gpu_memory_buffer_manager.cc

 // Copyright 2014 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 "content/child/child_gpu_memory_buffer_manager.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
@@ skipping 80 matching lines @@
   static_cast<gpu::GpuMemoryBufferImpl*>(buffer)->set_destruction_sync_token(
       sync_token);
 }
 
 std::unique_ptr<gfx::GpuFence> ChildGpuMemoryBufferManager::CreateGpuFence() {
   gfx::GpuFenceHandle handle;
   IPC::Message* message = new ChildProcessHostMsg_SyncCreateGpuFence(&handle);
   bool success = sender_->Send(message);
   if (!success)
     return nullptr;
-  std::unique_ptr<gpu::GpuFenceImpl> fence(new gpu::GpuFenceImpl(handle));
+  std::unique_ptr<gpu::GpuFenceImpl> fence(
+      gpu::GpuFenceImpl::CreateFromHandle(handle));
   return std::move(fence);
 }
 
 std::unique_ptr<gfx::GpuFence>
 ChildGpuMemoryBufferManager::CreateGpuFenceFromHandle(
     const gfx::GpuFenceHandle& handle) {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
 gfx::GpuFence* ChildGpuMemoryBufferManager::GpuFenceFromClientFence(
     ClientFence fence) {
   return gpu::GpuFenceImpl::FromClientFence(fence);
 }
 
 }  // namespace content