cc: Start using raster/eviction iterators.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index f5142f925e413404df06c65b195e438a4373a812..349f517632f77e39055f79a5aac635161a3fe10d 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -29,6 +29,8 @@
 #include "cc/output/output_surface_client.h"
 #include "cc/output/renderer.h"
 #include "cc/quads/render_pass.h"
+#include "cc/resources/eviction_tile_priority_queue.h"
+#include "cc/resources/raster_tile_priority_queue.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/tile_manager.h"
 #include "cc/scheduler/draw_result.h"
@@ -233,9 +235,14 @@ class CC_EXPORT LayerTreeHostImpl
   virtual void RunOnDemandRasterTask(Task* on_demand_raster_task) OVERRIDE;
 
   // TileManagerClient implementation.
-  virtual const std::vector<PictureLayerImpl*>& GetPictureLayers() OVERRIDE;
+  virtual const std::vector<PictureLayerImpl*>& GetPictureLayers()
+      const OVERRIDE;
   virtual void NotifyReadyToActivate() OVERRIDE;
   virtual void NotifyTileStateChanged(const Tile* tile) OVERRIDE;
+  virtual TilePriorityQueue* RebuildRasterQueue(
+      TreePriority tree_priority) OVERRIDE;
+  virtual TilePriorityQueue* RebuildEvictionQueue(
+      TreePriority tree_prirority) OVERRIDE;
 
   // ScrollbarAnimationControllerClient implementation.
   virtual void PostDelayedScrollbarFade(const base::Closure& start_fade,
@@ -465,6 +472,8 @@ class CC_EXPORT LayerTreeHostImpl
   void RegisterPictureLayerImpl(PictureLayerImpl* layer);
   void UnregisterPictureLayerImpl(PictureLayerImpl* layer);
 
+  void GetPairedPictureLayers(std::vector<PairedPictureLayer>* layers) const;
+
  protected:
   LayerTreeHostImpl(
       const LayerTreeSettings& settings,
@@ -697,6 +706,9 @@ class CC_EXPORT LayerTreeHostImpl
 
   std::vector<PictureLayerImpl*> picture_layers_;
 
+  RasterTilePriorityQueue raster_queue_;
+  EvictionTilePriorityQueue eviction_queue_;
+
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };