cc: Force an update on tile size after viewport resize

cc/layers/picture_layer_impl.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_LAYERS_PICTURE_LAYER_IMPL_H_
 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 63 matching lines @@
       const PictureLayerTiling* tiling) override;
   TilePriority::PriorityBin GetMaxTilePriorityBin() const override;
   WhichTree GetTree() const override;
   bool RequiresHighResToDraw() const override;
 
   void UpdateRasterSource(scoped_refptr<RasterSource> raster_source,
                           Region* new_invalidation,
                           const PictureLayerTilingSet* pending_set);
   bool UpdateTiles(bool resourceless_software_draw);
   void UpdateCanUseLCDTextAfterCommit();
+  void UpdateViewportAfterCommit();
   bool RasterSourceUsesLCDText() const;
 
   // Mask-related functions.
   void GetContentsResourceId(ResourceProvider::ResourceId* resource_id,
                              gfx::Size* resource_size) const override;
 
   void SetNearestNeighbor(bool nearest_neighbor);
 
   size_t GPUMemoryUsageInBytes() const override;
 
@@ skipping 83 matching lines @@
   // of comparing pointers, since objects pointed to are not guaranteed to
   // exist.
   std::vector<PictureLayerTiling*> last_append_quads_tilings_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_