cc: Remove unused PictureLayerImpl::didUpdateBounds function

cc/picture_layer_impl.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/picture_layer_impl.h"
 
 #include "base/time.h"
 #include "cc/append_quads_data.h"
 #include "cc/checkerboard_draw_quad.h"
 #include "cc/debug_border_draw_quad.h"
@@ skipping 152 matching lines @@
       time_delta);
 
   last_screen_space_transform_ = current_screen_space_transform;
   last_update_time_ = current_time;
   last_bounds_ = bounds();
   last_content_bounds_ = contentBounds();
   last_content_scale_x_ = contentsScaleX();
   last_content_scale_y_ = contentsScaleY();
 }
 
-void PictureLayerImpl::didUpdateBounds() {
-  if (is_mask_)
-    tilings_.Reset();
-  tilings_.SetLayerBounds(bounds());
-}
-
 scoped_refptr<Tile> PictureLayerImpl::CreateTile(PictureLayerTiling* tiling,
                                                  gfx::Rect rect) {
   TileManager* tile_manager = layerTreeImpl()->tile_manager();
 
   return make_scoped_refptr(new Tile(
       tile_manager,
       pile_.get(),
       rect.size(),
       GL_RGBA,
       rect,
@@ skipping 71 matching lines @@
     int max_size = layerTreeImpl()->MaxTextureSize();
     return gfx::Size(
         std::min(max_size, contentBounds().width()),
         std::min(max_size, contentBounds().height()));
   }
 
   return layerTreeImpl()->settings().defaultTileSize;
 }
 
 }  // namespace cc