Introducing SurfaceReferenceFactory

cc/surfaces/surface_reference_base.cc

Index: cc/surfaces/surface_reference_base.cc
diff --git a/cc/surfaces/surface_reference_base.cc b/cc/surfaces/surface_reference_base.cc
new file mode 100644
index 0000000000000000000000000000000000000000..727e5ad6284542ce5d5b73787f69cebca3f15642
--- /dev/null
+++ b/cc/surfaces/surface_reference_base.cc
@@ -0,0 +1,24 @@
+// 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_) << "Each leaf subclass must call Destroy in its destructor";
+}
+
+void SurfaceReferenceBase::Destroy() {
+  factory_->DestroyReference(this);
+  factory_ = nullptr;
+}
+
+}  // namespace cc