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

ui/gl/gl_context_cgl.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.
 
-#include "ui/gfx/gl/gl_context.h"
+#ifndef UI_GL_GL_CONTEXT_CGL_H_
+#define UI_GL_GL_CONTEXT_CGL_H_
+#pragma once
+
+#include "ui/gl/gl_context.h"
 
 namespace gfx {
 
 class GLSurface;
 
 // Encapsulates a CGL OpenGL context.
 class GLContextCGL : public GLContext {
  public:
   explicit GLContextCGL(GLShareGroup* share_group);
 
@@ skipping 20 matching lines @@
   // for stability reasons.
   static void ForceUseOfDiscreteGPU();
 
   void* context_;
   GpuPreference gpu_preference_;
 
   DISALLOW_COPY_AND_ASSIGN(GLContextCGL);
 };
 
 }  // namespace gfx
+
+#endif  // UI_GL_GL_CONTEXT_CGL_H_