Introducing SurfaceReferenceFactory

cc/surfaces/direct_surface_reference_factory.h

+// 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_DIRECT_SURFACE_REFERENCE_FACTORY_H_
+#define CC_SURFACES_DIRECT_SURFACE_REFERENCE_FACTORY_H_
+
+#include "cc/surfaces/sequence_surface_reference_factory.h"
+#include "cc/surfaces/surface_id.h"
+#include "cc/surfaces/surface_manager.h"
+#include "cc/surfaces/surface_sequence.h"
+
+namespace cc {
+
+class SurfaceManager;
+
+// The surface reference factory that interacts directly with SurfaceManager.
+// You probably don't need to instantiate this class directly.
+// Use SurfaceManager::reference_factory() instead.
+class CC_SURFACES_EXPORT DirectSurfaceReferenceFactory final
+    : public SequenceSurfaceReferenceFactory {
+ public:
+  explicit DirectSurfaceReferenceFactory(base::WeakPtr<SurfaceManager> manager);
+
+ private:
+  ~DirectSurfaceReferenceFactory() override;
+
+  // SequenceSurfaceReferenceFactory implementation:
+  void SatisfySequence(const SurfaceSequence& sequence) const override;
+  void RequireSequence(const SurfaceId& surface_id,
+                       const SurfaceSequence& sequence) const override;
+
+  base::WeakPtr<SurfaceManager> manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(DirectSurfaceReferenceFactory);
+};
+
+}  // namespace cc
+
+#endif  // CC_SURFACES_DIRECT_SURFACE_REFERENCE_FACTORY_H_