First batch of GCC fixes for GPU code.

gpu/command_buffer/service/gles2_cmd_decoder.h

 // Copyright (c) 2006-2009 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.
 
 // This file contains the GLES2Decoder class.
 
 #ifndef O3D_COMMAND_BUFFER_SERVICE_CROSS_GLES2_CMD_DECODER_H
 #define O3D_COMMAND_BUFFER_SERVICE_CROSS_GLES2_CMD_DECODER_H
 
 #include <build/build_config.h>
-#ifdef OS_WIN
+#if defined(OS_LINUX)
+#include "gpu/command_buffer/service/x_utils.h"
+#elif defined(OS_WIN)
 #include <windows.h>
 #endif
 #include "gpu/command_buffer/service/common_decoder.h"
 
 namespace command_buffer {
 namespace gles2 {
 
 // This class implements the AsyncAPIInterface interface, decoding GLES2
 // commands and calling GL.
 class GLES2Decoder : public CommonDecoder {
@@ skipping 52 matching lines @@
   HWND hwnd_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };
 
 }  // namespace gles2
 }  // namespace command_buffer
 
 #endif  // O3D_COMMAND_BUFFER_SERVICE_CROSS_GLES2_CMD_DECODER_H
-