cc: Implement tile iteration order based on pyramid sequence. [old]

cc/tiles/tiling_set_raster_queue_required.h

 // 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_TILES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
 #define CC_TILES_TILING_SET_RASTER_QUEUE_REQUIRED_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/tiles/picture_layer_tiling_set.h"
 #include "cc/tiles/raster_tile_priority_queue.h"
@@ skipping 17 matching lines @@
  private:
   // This iterator will return all tiles that are in the NOW bin on the given
   // tiling. The queue can then use these tiles and further filter them based on
   // whether they are required or not.
   class TilingIterator {
    public:
     TilingIterator();
     explicit TilingIterator(PictureLayerTiling* tiling,
                             TilingData* tiling_data,
                             const gfx::Rect& rect);
+    TilingIterator(const TilingIterator& other);
+    TilingIterator(TilingIterator&& other);
     ~TilingIterator();
 
+    TilingIterator& operator=(const TilingIterator& other);
+    TilingIterator& operator=(TilingIterator&& other);
+
     bool done() const { return !current_tile_.tile(); }
     const PrioritizedTile& operator*() const { return current_tile_; }
     TilingIterator& operator++();
 
    private:
     PictureLayerTiling* tiling_;
     TilingData* tiling_data_;
 
     PrioritizedTile current_tile_;
     TilingData::Iterator visible_iterator_;
   };
 
   bool IsTileRequired(const PrioritizedTile& prioritized_tile) const;
 
   TilingIterator iterator_;
   RasterTilePriorityQueue::Type type_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_TILING_SET_RASTER_QUEUE_REQUIRED_H_