cc: Early out of UpdateTiles for resoureceless draw

cc/test/fake_picture_layer_impl.cc

 // Copyright 2013 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/test/fake_picture_layer_impl.h"
 
 #include <stddef.h>
 
 #include <vector>
 #include "cc/tiles/tile.h"
@@ skipping 171 matching lines @@
 }
 
 size_t FakePictureLayerImpl::CountTilesRequired(
     TileRequirementCheck is_tile_required_callback) const {
   if (!HasValidTilePriorities())
     return 0;
 
   if (!tilings_)
     return 0;
 
-  if (visible_rect_for_tile_priority_.IsEmpty())
+  if (visible_layer_rect().IsEmpty())
     return 0;
 
   gfx::Rect rect = viewport_rect_for_tile_priority_in_content_space_;
-  rect.Intersect(visible_rect_for_tile_priority_);
+  rect.Intersect(visible_layer_rect());
 
   size_t count = 0;
 
   for (size_t i = 0; i < tilings_->num_tilings(); ++i) {
     PictureLayerTiling* tiling = tilings_->tiling_at(i);
     if (tiling->resolution() != HIGH_RESOLUTION &&
         tiling->resolution() != LOW_RESOLUTION)
       continue;
 
     for (PictureLayerTiling::CoverageIterator iter(tiling, 1.f, rect); iter;
@@ skipping 30 matching lines @@
 
   return CountTilesRequired(&PictureLayerTiling::IsTileRequiredForDraw);
 }
 
 void FakePictureLayerImpl::ReleaseResources() {
   PictureLayerImpl::ReleaseResources();
   ++release_resources_count_;
 }
 
 }  // namespace cc