Introducing SurfaceReferenceFactory

cc/surfaces/surface_embedding_base.cc

+// Copyright (c) 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_embedding_base.h"
+
+namespace cc {
+
+void SurfaceRef::Destroy() {
+  DCHECK(!is_deleted_);
+  embedding_->RemoveReference();
+  is_deleted_ = true;
+}
+
+void SurfaceRef::Destroy(CompositorFrameMetadata* metadata) {
+  embedding_->RemoveReference(metadata);
+  is_deleted_ = true;
+}
+
+SurfaceRef::~SurfaceRef() {
+  if (!is_deleted_)
+    embedding_->RemoveReference();
+}
+
+SurfaceRef::SurfaceRef(SurfaceEmbeddingPtr embedding)
+    : embedding_(std::move(embedding)) {
+  embedding_->AddReference();
+}
+
+}  // namespace cc