Add mouse input forwarding to gpu service

gpu/command_buffer/common/value_state.h

+// Copyright (c) 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.
+
+#ifndef GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
+#define GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
+
+#include "gpu/gpu_export.h"
+
+// From gl2/gl2ext.h.
+#ifndef GL_MOUSE_POSITION_CHROMIUM
+#define GL_MOUSE_POSITION_CHROMIUM 0x924C
+#endif
+
+namespace gpu {
+
+// Used to maintain Valuebuffer state, exposed to browser to
+// support passing ValueStates via IPC
+union GPU_EXPORT ValueState {
+  float float_value[4];
+  int int_value[4];
+};
+
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_