gpu: Add GpuFence framework.

gpu/ipc/service/gpu_channel.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/service/gpu_channel.h"
 
 #include <utility>
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 24 matching lines @@
 #include "gpu/command_buffer/service/image_factory.h"
 #include "gpu/command_buffer/service/mailbox_manager.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
 #include "gpu/ipc/common/gpu_messages.h"
 #include "gpu/ipc/service/gpu_channel_manager.h"
 #include "gpu/ipc/service/gpu_channel_manager_delegate.h"
 #include "gpu/ipc/service/gpu_memory_buffer_factory.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/message_filter.h"
 #include "ui/gl/gl_context.h"
+#include "ui/gl/gl_fence.h"
+#include "ui/gl/gl_fence_shared_event.h"
 #include "ui/gl/gl_image_shared_memory.h"
 #include "ui/gl/gl_surface.h"
 
 namespace gpu {
 namespace {
 
 // Number of milliseconds between successive vsync. Many GL commands block
 // on vsync, so thresholds for preemption should be multiples of this.
 const int64_t kVsyncIntervalMs = 17;
 
@@ skipping 1001 matching lines @@
         return nullptr;
 
       return manager->gpu_memory_buffer_factory()
           ->AsImageFactory()
           ->CreateImageForGpuMemoryBuffer(handle, size, format, internalformat,
                                           client_id_, surface_handle);
     }
   }
 }
 
+std::unique_ptr<gl::GLFence> GpuChannel::CreateFenceForGpuFence(
+    const gfx::GpuFenceHandle& handle) {
+  return base::MakeUnique<gl::GLFenceSharedEvent>(handle.shared_event_handle);
+}
+
 }  // namespace gpu