gpu: Add IOSurface backed GpuMemoryBuffer implementation.

ui/gl/gl_image_io_surface.h

 // Copyright (c) 2013 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_GL_GL_IMAGE_EGL_H_
-#define UI_GL_GL_IMAGE_EGL_H_
+#ifndef UI_GL_GL_IMAGE_IO_SURFACE_H_
+#define UI_GL_GL_IMAGE_IO_SURFACE_H_
 
-#include "ui/gl/gl_bindings.h"  // for EGLImageKHR
+#include "base/mac/scoped_cftyperef.h"
 #include "ui/gl/gl_image.h"
 
 namespace gfx {
 
-class GL_EXPORT GLImageEGL : public GLImage {
+class GL_EXPORT GLImageIOSurface : public GLImage {
  public:
-  explicit GLImageEGL(gfx::Size size);
+  explicit GLImageIOSurface(gfx::Size size);
 
   bool Initialize(gfx::GpuMemoryBufferHandle buffer);
 
   // Implement GLImage.
   virtual void Destroy() OVERRIDE;
   virtual gfx::Size GetSize() OVERRIDE;
   virtual bool BindTexImage(unsigned target) OVERRIDE;
   virtual void ReleaseTexImage(unsigned target) OVERRIDE;
   virtual void WillUseTexImage() OVERRIDE;
   virtual void DidUseTexImage() OVERRIDE;
-  virtual void SetReleaseAfterUse() OVERRIDE;
 
  protected:
-  virtual ~GLImageEGL();
+  virtual ~GLImageIOSurface();
 
  private:
-  EGLImageKHR egl_image_;
+  base::ScopedCFTypeRef<CFTypeRef> io_surface_;
   gfx::Size size_;
-  bool release_after_use_;
-  bool in_use_;
-  unsigned target_;
 
-  DISALLOW_COPY_AND_ASSIGN(GLImageEGL);
+  DISALLOW_COPY_AND_ASSIGN(GLImageIOSurface);
 };
 
 }  // namespace gfx
 
-#endif  // UI_GL_GL_IMAGE_EGL_H_
+#endif  // UI_GL_GL_IMAGE_IO_SURFACE_H_