cc: Added tile bundles

cc/resources/picture_layer_tiling.h

Index: cc/resources/picture_layer_tiling.h
diff --git a/cc/resources/picture_layer_tiling.h b/cc/resources/picture_layer_tiling.h
index 7d7626e74706f2f06e8395fd381e9d896aa45943..f5da1cf66a5a27d607b65ed3a03f542b5b7d3934 100644
--- a/cc/resources/picture_layer_tiling.h
+++ b/cc/resources/picture_layer_tiling.h
@@ -15,6 +15,7 @@
 #include "cc/base/region.h"
 #include "cc/base/tiling_data.h"
 #include "cc/resources/tile.h"
+#include "cc/resources/tile_bundle.h"
 #include "cc/resources/tile_priority.h"
 #include "ui/gfx/rect.h"
 
@@ -29,12 +30,19 @@ class CC_EXPORT PictureLayerTilingClient {
   virtual scoped_refptr<Tile> CreateTile(
     PictureLayerTiling* tiling,
     gfx::Rect content_rect) = 0;
+  virtual scoped_refptr<TileBundle> CreateTileBundle(int width,
+                                                     int height,
+                                                     int offset_x,
+                                                     int offset_y) = 0;
   virtual void UpdatePile(Tile* tile) = 0;
   virtual gfx::Size CalculateTileSize(
     gfx::Size content_bounds) const = 0;
   virtual const Region* GetInvalidation() = 0;
   virtual const PictureLayerTiling* GetTwinTiling(
       const PictureLayerTiling* tiling) = 0;
+  virtual bool IsActive() const = 0;
+  virtual bool IsPending() const = 0;
+  virtual bool IsRecycled() const = 0;
 
  protected:
   virtual ~PictureLayerTilingClient() {}
@@ -72,9 +80,11 @@ class CC_EXPORT PictureLayerTiling {
 
   std::vector<Tile*> AllTilesForTesting() const {
     std::vector<Tile*> all_tiles;
-    for (TileMap::const_iterator it = tiles_.begin();
-         it != tiles_.end(); ++it)
-      all_tiles.push_back(it->second.get());
+    for (TileBundleMap::const_iterator it = tile_bundles_.begin();
+         it != tile_bundles_.end(); ++it) {
+      for (TileBundle::Iterator tile_it(it->second.get()); tile_it; ++tile_it)
+        all_tiles.push_back(*tile_it);
+    }
     return all_tiles;
   }
 
@@ -104,6 +114,9 @@ class CC_EXPORT PictureLayerTiling {
     Tile* operator->() const { return current_tile_; }
     Tile* operator*() const { return current_tile_; }
 
+    TilePriority priority();
+    void SetPriorityForTesting(const TilePriority& priority);
+
     CoverageIterator& operator++();
     operator bool() const { return tile_j_ <= bottom_; }
 
@@ -184,15 +197,22 @@ class CC_EXPORT PictureLayerTiling {
   }
 
  protected:
-  typedef std::pair<int, int> TileMapKey;
-  typedef base::hash_map<TileMapKey, scoped_refptr<Tile> > TileMap;
+  friend class TileBundle;
+
+  typedef std::pair<int, int> TileBundleMapKey;
+  typedef base::hash_map<TileBundleMapKey, scoped_refptr<TileBundle> >
+      TileBundleMap;
 
   PictureLayerTiling(float contents_scale,
                      gfx::Size layer_bounds,
                      PictureLayerTilingClient* client);
   void SetLiveTilesRect(gfx::Rect live_tiles_rect);
   void CreateTile(int i, int j, const PictureLayerTiling* twin_tiling);
+  bool RemoveTile(int i, int j);
   Tile* TileAt(int, int) const;
+  TileBundle* TileBundleContainingTileAt(int, int) const;
+  TileBundle* CreateBundleForTileAt(int, int);
+  TileBundle* TileBundleAt(int, int) const;
 
   // Given properties.
   float contents_scale_;
@@ -202,7 +222,9 @@ class CC_EXPORT PictureLayerTiling {
 
   // Internal data.
   TilingData tiling_data_;
-  TileMap tiles_;  // It is not legal to have a NULL tile in the tiles_ map.
+  TilingData bundle_tiling_data_;
+  TileBundleMap tile_bundles_;  // It is not legal to have a NULL tile in the
+                                // tiles_ map.
   gfx::Rect live_tiles_rect_;
 
   // State saved for computing velocities based upon finite differences.