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

ui/gfx/gl/gl_fence.h

-// Copyright (c) 2011 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_
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "ui/gfx/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_