cc: Fix tile priority inversion in picture layer tiling.

cc/tiles/picture_layer_tiling.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_TILES_PICTURE_LAYER_TILING_H_
 #define CC_TILES_PICTURE_LAYER_TILING_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 139 matching lines @@
   }
   const TilingData& TilingDataForTesting() const { return tiling_data_; }
   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());
     return all_tiles;
   }
 
   void UpdateAllRequiredStateForTesting() {
-    for (const auto& key_tile_pair : tiles_)
-      UpdateRequiredStatesOnTile(key_tile_pair.second.get());
+    for (const auto& key_tile_pair : tiles_) {
+      Tile* tile = key_tile_pair.second.get();
+      UpdateRequiredStatesOnTile(tile);
+    }
   }
   std::map<const Tile*, PrioritizedTile>
   UpdateAndGetAllPrioritizedTilesForTesting() const;
 
   void SetAllTilesOccludedForTesting() {
     gfx::Rect viewport_in_layer_space =
         ScaleToEnclosingRect(current_visible_rect_, 1.f / contents_scale_);
     current_occlusion_in_layer_space_ =
         Occlusion(gfx::Transform(),
                   SimpleEnclosedRegion(viewport_in_layer_space),
@@ skipping 186 matching lines @@
   bool has_eventually_rect_tiles_ = false;
   bool all_tiles_done_ = true;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PictureLayerTiling);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_PICTURE_LAYER_TILING_H_