[cc] Tiles and tile manager for impl side painting

cc/tile.h

+// Copyright 2012 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_TILE_H_
+#define CC_TILE_H_
+
+#include "base/memory/ref_counted.h"
+#include "cc/picture_pile.h"
+#include "cc/resource_provider.h"
+#include "cc/tile_priority.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/size.h"
+
+namespace cc {
+
+class TileManager;
+
+enum TileQuality {
+  LOW_TILE_QUALITY,
+  NORMAL_TILE_QUALITY
+};
+
+class Tile : public base::RefCounted<Tile> {
+ public:
+  Tile(TileManager* tile_manager,
+       gfx::Size tile_size,
+       gfx::Rect rect_inside_picture,
+       TileQuality quality);
+
+  void SetPicturePile(int frame_number, scoped_refptr<PicturePile> picture_pile) {}

[enne (OOO), 2012/11/08 17:16:50]

I have some misgivings about PicturePile ownership, but this seems good for now.

+  void SetPriority(int frame_number, TilePriority) {}
+
+  bool IsDrawable(int frame_number) { return false; }
+  ResourceProvider::ResourceId GetDrawableResourceId(int frame_number) { return 0; }
+
+ private:
+  friend class base::RefCounted<Tile>;
+  friend class TileManager;
+
+  ~Tile();
+
+  TileManager* tile_manager_;
+  gfx::Rect tile_size_;
+  gfx::Rect rect_inside_picture_;
+  TileQuality quality_;
+};
+
+}  // namespace cc
+#endif