Introducing SurfaceReferenceFactory

cc/surfaces/surface_reference_base.cc

+// 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.
+
+#include "cc/surfaces/surface_reference_base.h"
+
+#include "cc/surfaces/surface_reference_factory.h"
+
+namespace cc {
+
+SurfaceReferenceBase::SurfaceReferenceBase(
+    scoped_refptr<const SurfaceReferenceFactory> factory)
+    : factory_(std::move(factory)) {}
+
+SurfaceReferenceBase::~SurfaceReferenceBase() {
+  DCHECK(!factory_) << "Destroy must be called before destruction";
+}
+
+void SurfaceReferenceBase::Destroy() {
+  DCHECK(factory_) << "Destroy can only be called once";
+  factory_->DestroyReference(this);
+  factory_ = nullptr;
+}
+
+void SurfaceReferenceBase::Destroy(CompositorFrameMetadata* metadata) {
+  DCHECK(factory_) << "Destroy can only be called once";
+  factory_->DestroyReference(this, metadata);
+  factory_ = nullptr;
+}
+
+}  // namespace cc