Implement GLX for Ozone X11.

ui/gfx/x/x11_types.h

 // Copyright (c) 2013 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_GFX_X_X11_UTIL_H_
 #define UI_GFX_X_X11_UTIL_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "ui/gfx/gfx_export.h"
 
 typedef unsigned long XAtom;
 typedef unsigned long XID;
+typedef union _XEvent XEvent;
 typedef struct _XImage XImage;
 typedef struct _XGC *GC;
 typedef struct _XDisplay XDisplay;
 typedef struct __GLXFBConfigRec *GLXFBConfig;
 typedef XID GLXWindow;
 typedef XID GLXDrawable;
 
 extern "C" {
 int XFree(void*);
 }
@@ skipping 48 matching lines @@
                              int src_y,
                              int dst_x,
                              int dst_y,
                              int copy_width,
                              int copy_height);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_X_X11_UTIL_H_