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

ui/gfx/gl/gl_context_stub.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.
-
-#ifndef UI_GFX_GL_GL_CONTEXT_STUB_H_
-#define UI_GFX_GL_GL_CONTEXT_STUB_H_
-#pragma once
-
-#include "ui/gfx/gl/gl_context.h"
-
-namespace gfx {
-
-// A GLContext that does nothing for unit tests.
-class GL_EXPORT GLContextStub : public GLContext {
- public:
-  GLContextStub();
-
-  // 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;
-  virtual std::string GetExtensions() OVERRIDE;
-
- protected:
-  virtual ~GLContextStub();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(GLContextStub);
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_GL_GL_CONTEXT_STUB_H_