GLContext no longer holds a pointer to a GLSurface.

ui/gfx/gl/gl_context_cgl.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.
 
-#include <string>
-
-#include "base/memory/scoped_ptr.h"
 #include "ui/gfx/gl/gl_context.h"
-#include "ui/gfx/size.h"
 
 namespace gfx {
 
-class GLSurfaceCGL;
+class GLSurface;
 
 // Encapsulates a CGL OpenGL context.
 class GLContextCGL : public GLContext {
  public:
-  explicit GLContextCGL(GLSurfaceCGL* surface);
+  GLContextCGL();
   virtual ~GLContextCGL();
 
   // Initializes the GL context.
   bool Initialize(GLContext* shared_context);
 
   // Implement GLContext.
   virtual void Destroy();
-  virtual bool MakeCurrent();
-  virtual bool IsCurrent();
-  virtual bool IsOffscreen();
-  virtual bool SwapBuffers();
-  virtual gfx::Size GetSize();
+  virtual bool MakeCurrent(GLSurface* surface);
+  virtual void ReleaseCurrent(GLSurface* surface);
+  virtual bool IsCurrent(GLSurface* surface);
   virtual void* GetHandle();
   virtual void SetSwapInterval(int interval);
 
  private:
-  scoped_ptr<GLSurfaceCGL> surface_;
   void* context_;
 
   DISALLOW_COPY_AND_ASSIGN(GLContextCGL);
 };
 
 }  // namespace gfx