Replacing SurfaceReferenceBase and SequenceSurfaceReference with Closures

cc/surfaces/sequence_surface_reference.h

Index: cc/surfaces/sequence_surface_reference.h
diff --git a/cc/surfaces/sequence_surface_reference.h b/cc/surfaces/sequence_surface_reference.h
deleted file mode 100644
index 2f79f71cc789c9c0812541cc96d640a93340781b..0000000000000000000000000000000000000000
--- a/cc/surfaces/sequence_surface_reference.h
+++ /dev/null
@@ -1,32 +0,0 @@
-// 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_SEQUENCE_SURFACE_REFERENCE_H_
-#define CC_SURFACES_SEQUENCE_SURFACE_REFERENCE_H_
-
-#include "cc/surfaces/surface_reference_base.h"
-#include "cc/surfaces/surface_reference_factory.h"
-#include "cc/surfaces/surface_sequence.h"
-
-namespace cc {
-
-// A surface reference which is internally implemented using SurfaceSequence
-class SequenceSurfaceReference final : public SurfaceReferenceBase {
- public:
-  SequenceSurfaceReference(scoped_refptr<const SurfaceReferenceFactory> factory,
-                           const SurfaceSequence& sequence);
-
-  ~SequenceSurfaceReference() override;
-
-  const SurfaceSequence& sequence() const { return sequence_; }
-
- private:
-  const SurfaceSequence sequence_;
-
-  DISALLOW_COPY_AND_ASSIGN(SequenceSurfaceReference);
-};
-
-}  // namespace cc
-
-#endif  // CC_SURFACES_SEQUENCE_SURFACE_REFERENCE_H_