cc: Invalidate eviction tiles cache when a tile is deleted.

cc/resources/picture_layer_tiling.cc

 // 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.
 
 #include "cc/resources/picture_layer_tiling.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <set>
@@ skipping 448 matching lines @@
 }
 
 bool PictureLayerTiling::RemoveTileAt(int i,
                                       int j,
                                       PictureLayerTiling* recycled_twin) {
   TileMap::iterator found = tiles_.find(TileMapKey(i, j));
   if (found == tiles_.end())
     return false;
   found->second->set_shared(false);
   tiles_.erase(found);
+  eviction_tiles_cache_valid_ = false;
   if (recycled_twin) {
     // Recycled twin does not also have a recycled twin, so pass NULL.
     recycled_twin->RemoveTileAt(i, j, NULL);
   }
   return true;
 }
 
 void PictureLayerTiling::Reset() {
   live_tiles_rect_ = gfx::Rect();
   PictureLayerTiling* recycled_twin = client_->GetRecycledTwinTiling(this);
@@ skipping 743 matching lines @@
   DCHECK(*this);
   do {
     ++current_eviction_tiles_index_;
   } while (current_eviction_tiles_index_ != eviction_tiles_->size() &&
            !(*eviction_tiles_)[current_eviction_tiles_index_]->HasResources());
 
   return *this;
 }
 
 }  // namespace cc