ui: Move gl/ directory out of gfx/, up to ui/.

ui/gl/gl_fence.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_GFX_GL_GL_FENCE_H_
-#define UI_GFX_GL_GL_FENCE_H_
+#ifndef UI_GL_GL_FENCE_H_
+#define UI_GL_GL_FENCE_H_
+#pragma once
 
 #include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "ui/gfx/gl/gl_export.h"
+#include "ui/gl/gl_export.h"
 
 namespace gfx {
 
 class GL_EXPORT GLFence {
  public:
   GLFence();
   virtual ~GLFence();
 
   static GLFence* Create();
   virtual bool HasCompleted() = 0;
 
  protected:
   static bool IsContextLost();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GLFence);
 };
 
 }  // namespace gfx
 
-#endif  // UI_GFX_GL_GL_FENCE_H_
+#endif  // UI_GL_GL_FENCE_H_