Fix gpu_video_decode_accelerator include order by renaming enum with X11 name collision

ui/gl/gl_bindings.h

 // Copyright (c) 2012 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 UI_GL_GL_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
 
 // Includes the platform independent and platform dependent GL headers.
 // Only include this in cc files. It pulls in system headers, including
 // the X11 headers on linux, which define all kinds of macros that are
@@ skipping 21 matching lines @@
 #include "ui/gl/gl_export.h"
 
 // The standard OpenGL native extension headers are also included.
 #if defined(OS_WIN)
 #include <GL/wglext.h>
 #elif defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
 #elif defined(USE_GLX)
 #include <GL/glx.h>
 #include <GL/glxext.h>
+#endif
 
 // Undefine some macros defined by X headers. This is why this file should only
 // be included in .cc files.
 #undef Bool
 #undef None
 #undef Status
-#endif
 
 
 // GLES2 defines not part of Desktop GL
 // Shader Precision-Specified Types
 #define GL_LOW_FLOAT                                     0x8DF0
 #define GL_MEDIUM_FLOAT                                  0x8DF1
 #define GL_HIGH_FLOAT                                    0x8DF2
 #define GL_LOW_INT                                       0x8DF3
 #define GL_MEDIUM_INT                                    0x8DF4
 #define GL_HIGH_INT                                      0x8DF5
@@ skipping 436 matching lines @@
 #endif
 
 #if defined(USE_GLX)
 GL_EXPORT extern GLXApi* g_current_glx_context;
 GL_EXPORT extern DriverGLX g_driver_glx;
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_BINDINGS_H_