Initial surface aggregator implementation

cc/surfaces/surface_aggregator.h

Index: cc/surfaces/surface_aggregator.h
diff --git a/cc/surfaces/surface_aggregator.h b/cc/surfaces/surface_aggregator.h
new file mode 100644
index 0000000000000000000000000000000000000000..61482882205f6f5a5169c91d07a0b47e275592fc
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+++ b/cc/surfaces/surface_aggregator.h
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+// Copyright 2014 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_SURFACE_AGGREGATOR_H_
+#define CC_SURFACES_SURFACE_AGGREGATOR_H_
+
+#include <set>
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/quads/render_pass.h"
+#include "cc/surfaces/surfaces_export.h"
+
+namespace cc {
+
+class CompositorFrame;
+class DelegatedFrameData;
+class SurfaceManager;
+
+class CC_SURFACES_EXPORT SurfaceAggregator {
+ public:
+  explicit SurfaceAggregator(SurfaceManager* manager);
+  ~SurfaceAggregator();
+
+  scoped_ptr<CompositorFrame> Aggregate(int surface_id);
+
+ private:
+  void CopyQuadsToPass(const QuadList& source_quad_list,
+                       const SharedQuadStateList& source_shared_quad_state_list,
+                       RenderPass* dest_pass,
+                       RenderPassList* dest_pass_list,
+                       std::set<int>* referenced_surfaces);
+  void CopyPasses(const RenderPassList& source_pass_list,
+                  RenderPassList* dest_pass_list,
+                  std::set<int>* referenced_surfaces);
+
+  SurfaceManager* manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
+};
+
+}  // namespace cc
+
+#endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_