Decouple browser-specific GPU IPC messages from GPU service IPCs

content/common/gpu/buffer_presented_params_mac.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 CONTENT_COMMON_GPU_BUFFER_PRESENTED_PARAMS_MAC_H_
+#define CONTENT_COMMON_GPU_BUFFER_PRESENTED_PARAMS_MAC_H_
+
+#include "base/time/time.h"
+
+namespace content {
+
+struct BufferPresentedParams {
+  BufferPresentedParams();
+  ~BufferPresentedParams();
+
+  int32_t surface_id;
+  base::TimeTicks vsync_timebase;
+  base::TimeDelta vsync_interval;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_BUFFER_PRESENTED_PARAMS_MAC_H_