Replacing SurfaceReferenceBase and SequenceSurfaceReference with Closures

cc/surfaces/surface_reference_base.h

-// Copyright 2016 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 CC_SURFACES_SURFACE_REFERENCE_BASE_H_
-#define CC_SURFACES_SURFACE_REFERENCE_BASE_H_
-
-#include <memory>
-
-#include "base/memory/ptr_util.h"
-#include "base/memory/ref_counted.h"
-#include "cc/surfaces/surface_sequence.h"
-
-namespace cc {
-
-class SurfaceReferenceFactory;
-
-// The base class for the references returned by SurfaceReferenceFactory and
-// its subclasses.
-// The objects of this class hold on their surface reference until they go
-// out of scope.
-// To keep things as lightweight as possible, the base class only keeps a
-// pointer to the factory and it's up to the subclasses to decide what other
-// information they need to keep.
-class SurfaceReferenceBase {
- public:
-  explicit SurfaceReferenceBase(
-      scoped_refptr<const SurfaceReferenceFactory> factory);
-
-  virtual ~SurfaceReferenceBase();
-
- protected:
-  void Destroy();
-
- private:
-  scoped_refptr<const SurfaceReferenceFactory> factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SurfaceReferenceBase);
-};
-
-}  // namespace cc
-
-#endif  // CC_SURFACES_SURFACE_REFERENCE_BASE_H_