Replacing SurfaceReferenceBase and SequenceSurfaceReference with Closures

cc/surfaces/scoped_surface_reference.h

Index: cc/surfaces/scoped_surface_reference.h
diff --git a/cc/surfaces/scoped_surface_reference.h b/cc/surfaces/scoped_surface_reference.h
new file mode 100644
index 0000000000000000000000000000000000000000..cb838769e182933d9f0ab6d9a73b71efebeea6a5
--- /dev/null
+++ b/cc/surfaces/scoped_surface_reference.h
@@ -0,0 +1,35 @@
+// Copyright 2017 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_SCOPED_SURFACE_REFERENCE_H_
+#define CC_SURFACES_SCOPED_SURFACE_REFERENCE_H_
+
+#include "cc/surfaces/scoped_surface_reference_base.h"
+#include "cc/surfaces/surface_reference.h"
+#include "cc/surfaces/surface_reference_factory.h"
+
+namespace cc {
+
+// A SurfaceReference that automatically removes itself when it goes out of
+// scope.
+class ScopedSurfaceReference : public ScopedSurfaceReferenceBase {
+ public:
+  ScopedSurfaceReference(scoped_refptr<const SurfaceReferenceFactory> factory,
+                         const SurfaceReference& surface_reference);
+
+  ~ScopedSurfaceReference() override;
+
+  const SurfaceReference& surface_reference() const {
+    return surface_reference_;
+  }
+
+ private:
+  const SurfaceReference surface_reference_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedSurfaceReference);
+};
+
+}  // namespace cc
+
+#endif  // CC_SURFACES_SCOPED_SURFACE_REFERENCE_H_