cc: Implement geometry-based tile eviction

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 daa04851d9c22f8759e283d5fd0d9d048b3f22bb..dd625e4228b9febb05f9a23c5ac33b13ef2e6590 100644
--- a/cc/resources/picture_layer_tiling.h
+++ b/cc/resources/picture_layer_tiling.h
@@ -62,15 +62,6 @@ class CC_EXPORT PictureLayerTiling {
  public:
   static const int kBorderTexels = 1;
 
-  enum EvictionCategory {
-    EVENTUALLY,
-    EVENTUALLY_AND_REQUIRED_FOR_ACTIVATION,
-    SOON,
-    SOON_AND_REQUIRED_FOR_ACTIVATION,
-    NOW,
-    NOW_AND_REQUIRED_FOR_ACTIVATION
-  };
-
   class CC_EXPORT TilingRasterTileIterator {
    public:
     TilingRasterTileIterator();
@@ -303,10 +294,6 @@ class CC_EXPORT PictureLayerTiling {
                             const gfx::Rect& visible_rect_in_content_space)
       const;
 
-  void UpdateEvictionCacheIfNeeded(TreePriority tree_priority);
-  const std::vector<Tile*>* GetEvictionTiles(TreePriority tree_priority,
-                                             EvictionCategory category);
-
   void Invalidate(const Region& layer_region);
 
   void DoInvalidate(const Region& layer_region,
@@ -347,19 +334,6 @@ class CC_EXPORT PictureLayerTiling {
 
   Occlusion current_occlusion_in_layer_space_;
 
-  // TODO(reveman): Remove this in favour of an array of eviction_tiles_ when we
-  // change all enums to have a consistent way of getting the count/last
-  // element.
-  std::vector<Tile*> eviction_tiles_now_;
-  std::vector<Tile*> eviction_tiles_now_and_required_for_activation_;
-  std::vector<Tile*> eviction_tiles_soon_;
-  std::vector<Tile*> eviction_tiles_soon_and_required_for_activation_;
-  std::vector<Tile*> eviction_tiles_eventually_;
-  std::vector<Tile*> eviction_tiles_eventually_and_required_for_activation_;
-
-  bool eviction_tiles_cache_valid_;
-  TreePriority eviction_cache_tree_priority_;
-
  private:
   DISALLOW_ASSIGN(PictureLayerTiling);