Introducing SurfaceReferenceFactory

cc/surfaces/sequence_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_SEQUENCE_SURFACE_REFERENCE_FACTORY_H_
+#define CC_SURFACES_SEQUENCE_SURFACE_REFERENCE_FACTORY_H_
+
+#include "cc/output/compositor_frame_metadata.h"
+#include "cc/surfaces/surface_reference_base.h"
+#include "cc/surfaces/surface_reference_factory.h"
+#include "cc/surfaces/surfaces_export.h"
+
+namespace cc {
+
+// A surface reference factory that generates references which internally
+// use SurfaceSequence.
+class CC_SURFACES_EXPORT SequenceSurfaceReferenceFactory
+    : public NON_EXPORTED_BASE(SurfaceReferenceFactory) {
+ public:
+  SequenceSurfaceReferenceFactory() = default;
+
+  std::unique_ptr<SurfaceReferenceBase> CreateReference(
+      SurfaceReferenceOwner* owner,
+      const SurfaceId& surface_id) const override;
+
+ protected:
+  ~SequenceSurfaceReferenceFactory() override = default;
+
+ private:
+  virtual void RequireSequence(const SurfaceId& surface_id,
+                               const SurfaceSequence& sequence) const = 0;
+  virtual void SatisfySequence(const SurfaceSequence& sequence) const = 0;
+
+  // SurfaceReferenceFactory implementation:
+  void DestroyReference(SurfaceReferenceBase* surface_ref,
+                        CompositorFrameMetadata* metadata) const override;
+  void DestroyReference(SurfaceReferenceBase* surface_ref) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(SequenceSurfaceReferenceFactory);
+};
+
+}  // namespace cc
+
+#endif  // CC_SURFACES_SEQUENCE_SURFACE_REFERENCE_FACTORY_H_