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

ui/gfx/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"
-
-namespace gfx {
-
-class GLSurface;
-
-// Encapsulates a CGL OpenGL context.
-class GLContextCGL : public GLContext {
- public:
-  explicit GLContextCGL(GLShareGroup* share_group);
-
-  // Implement GLContext.
-  virtual bool Initialize(GLSurface* compatible_surface,
-                          GpuPreference gpu_preference) OVERRIDE;
-  virtual void Destroy() OVERRIDE;
-  virtual bool MakeCurrent(GLSurface* surface) OVERRIDE;
-  virtual void ReleaseCurrent(GLSurface* surface) OVERRIDE;
-  virtual bool IsCurrent(GLSurface* surface) OVERRIDE;
-  virtual void* GetHandle() OVERRIDE;
-  virtual void SetSwapInterval(int interval) OVERRIDE;
-
- protected:
-  virtual ~GLContextCGL();
-
- private:
-  // Expose ForceUseOfDiscreteGPU only to GLContext implementation.
-  friend class GLContext;
-
-  GpuPreference GetGpuPreference();
-
-  // Helper for dual-GPU support on systems where this is necessary
-  // for stability reasons.
-  static void ForceUseOfDiscreteGPU();
-
-  void* context_;
-  GpuPreference gpu_preference_;
-
-  DISALLOW_COPY_AND_ASSIGN(GLContextCGL);
-};
-
-}  // namespace gfx