Pass responsibility for IOSurface-texture reuse to the gpu process.

gpu/command_buffer/common/texture_in_use_response.h

Index: gpu/command_buffer/common/texture_in_use_response.h
diff --git a/gpu/command_buffer/common/texture_in_use_response.h b/gpu/command_buffer/common/texture_in_use_response.h
new file mode 100644
index 0000000000000000000000000000000000000000..b3e6d73f4025a413db7b2bfb133d01422e1f8f24
--- /dev/null
+++ b/gpu/command_buffer/common/texture_in_use_response.h
@@ -0,0 +1,27 @@
+// 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"
+
+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;
+};
+
+using TextureInUseResponses = std::vector<TextureInUseResponse>;
+
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_COMMON_TEXTURE_IN_USE_RESPONSE_H_