cc: Fix tile priority inversion in picture layer tiling.

cc/tiles/tiling_set_raster_queue_required.cc

 // 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.
 
 #include "cc/tiles/tiling_set_raster_queue_required.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 87 matching lines @@
       TilingData::Iterator(tiling_data_, rect, false /* include_borders */);
   if (!visible_iterator_)
     return;
 
   Tile* tile =
       tiling_->TileAt(visible_iterator_.index_x(), visible_iterator_.index_y());
   // If this is a valid tile, return it. Note that we have to use a tiling check
   // for occlusion, since the tile's internal state has not yet been updated.
   if (tile && tile->draw_info().NeedsRaster() &&
       !tiling_->IsTileOccluded(tile)) {
-    tiling_->UpdateRequiredStatesOnTile(tile);
     current_tile_ = tiling_->MakePrioritizedTile(
         tile, tiling_->ComputePriorityRectTypeForTile(tile));
     return;
   }
   ++(*this);
 }
 
 TilingSetRasterQueueRequired::TilingIterator::~TilingIterator() {
 }
 
@@ skipping 19 matching lines @@
     // (by UpdateTilePriority). The tiling check does not rely on tile's
     // internal state (it is, in fact, used to determine the tile's state).
     if (tiling_->IsTileOccluded(tile))
       continue;
 
     // If we get here, that means we have a valid tile that needs raster and is
     // in the NOW bin, which means that it can be required.
     break;
   }
 
-  tiling_->UpdateRequiredStatesOnTile(tile);
   current_tile_ = tiling_->MakePrioritizedTile(
       tile, tiling_->ComputePriorityRectTypeForTile(tile));
   return *this;
 }
 
 }  // namespace cc