Fixed compile error for unit-tests on linux. We do not include any glew file ...

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <vector>
 #include <string>
 #include <map>
 #include <build/build_config.h>
 #include "base/scoped_ptr.h"
 #define GLES2_GPU_SERVICE 1
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/cmd_buffer_engine.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/command_buffer/service/gles2_cmd_validation.h"
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) && !defined(UNIT_TEST)
+// XWindowWrapper is stubbed out for unit-tests.
 #include "gpu/command_buffer/service/x_utils.h"
 #endif
 
 namespace gpu {
 namespace gles2 {
 
 // Check that certain assumptions the code makes are true. There are places in
 // the code where shared memory is passed direclty to GL. Example, glUniformiv,
 // glShaderSource. The command buffer code assumes GLint and GLsizei (and maybe
 // a few others) are 32bits. If they are not 32bits the code will have to change
@@ skipping 1873 matching lines @@
   return parse_error::kParseNoError;
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu