cc: Don't add new tilings while syncing a tiling.

cc/resources/picture_layer_tiling_set.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_set.h"
 
 #include <limits>
 
 namespace cc {
 
@@ skipping 289 matching lines @@
   }
 
   return *this;
 }
 
 PictureLayerTilingSet::CoverageIterator::operator bool() const {
   return current_tiling_ < static_cast<int>(set_->tilings_.size()) ||
       region_iter_.has_rect();
 }
 
-void PictureLayerTilingSet::UpdateTilePriorities(
-    WhichTree tree,
-    const gfx::Rect& visible_layer_rect,
-    float layer_contents_scale,
-    double current_frame_time_in_seconds) {
-  for (size_t i = 0; i < tilings_.size(); ++i) {
-    tilings_[i]->UpdateTilePriorities(tree,
-                                      visible_layer_rect,
-                                      layer_contents_scale,
-                                      current_frame_time_in_seconds);
-  }
-}
-
 void PictureLayerTilingSet::DidBecomeActive() {
   for (size_t i = 0; i < tilings_.size(); ++i)
     tilings_[i]->DidBecomeActive();
 }
 
 void PictureLayerTilingSet::DidBecomeRecycled() {
   for (size_t i = 0; i < tilings_.size(); ++i)
     tilings_[i]->DidBecomeRecycled();
 }
 
 scoped_ptr<base::Value> PictureLayerTilingSet::AsValue() const {
   scoped_ptr<base::ListValue> state(new base::ListValue());
   for (size_t i = 0; i < tilings_.size(); ++i)
     state->Append(tilings_[i]->AsValue().release());
   return state.PassAs<base::Value>();
 }
 
 size_t PictureLayerTilingSet::GPUMemoryUsageInBytes() const {
   size_t amount = 0;
   for (size_t i = 0; i < tilings_.size(); ++i)
     amount += tilings_[i]->GPUMemoryUsageInBytes();
   return amount;
 }
 
 }  // namespace cc