NOT for review (for discussion): Query IOSurfaceIsInUse in the browser process

gpu/command_buffer/common/texture_in_use_response.h

 // Copyright 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_COMMAND_BUFFER_COMMON_TEXTURE_IN_USE_RESPONSE_H_
 #define GPU_COMMAND_BUFFER_COMMON_TEXTURE_IN_USE_RESPONSE_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "gpu/gpu_export.h"
+#include "ui/gfx/gpu_memory_buffer.h"
 
 namespace gpu {
 
 // A response from the gpu process about whether a texture is in use by the
 // system compositor.
 struct GPU_EXPORT TextureInUseResponse {
   uint32_t texture = 0;
-  bool in_use = false;
+  gfx::GpuMemoryBufferHandle gpu_memory_buffer_handle;
+  bool in_use_valid = false;
 };
 
 using TextureInUseResponses = std::vector<TextureInUseResponse>;
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_TEXTURE_IN_USE_RESPONSE_H_