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

cc/trees/layer_tree_impl.cc

 // Copyright 2011 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/trees/layer_tree_impl.h"
 
 #include <limits>
 #include <set>
 
 #include "base/debug/trace_event.h"
@@ skipping 479 matching lines @@
     // UpdateTilePriorities on layers that will be visible (and thus have valid
     // draw properties) and not because any ordering is required.
     typedef LayerIterator<LayerImpl> LayerIteratorType;
     LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list_);
     for (LayerIteratorType it =
              LayerIteratorType::Begin(&render_surface_layer_list_);
          it != end;
          ++it) {
       LayerImpl* layer = *it;
       if (it.represents_itself())
-        layer->UpdateTilePriorities();
+        layer->UpdateTiles();
 
       if (!it.represents_contributing_render_surface())
         continue;
 
       if (layer->mask_layer())
-        layer->mask_layer()->UpdateTilePriorities();
+        layer->mask_layer()->UpdateTiles();
       if (layer->replica_layer() && layer->replica_layer()->mask_layer())
-        layer->replica_layer()->mask_layer()->UpdateTilePriorities();
+        layer->replica_layer()->mask_layer()->UpdateTiles();
     }
   }
 
   DCHECK(!needs_update_draw_properties_) <<
       "CalcDrawProperties should not set_needs_update_draw_properties()";
   return true;
 }
 
 const LayerImplList& LayerTreeImpl::RenderSurfaceLayerList() const {
   // If this assert triggers, then the list is dirty.
@@ skipping 773 matching lines @@
 
 void LayerTreeImpl::RegisterPictureLayerImpl(PictureLayerImpl* layer) {
   layer_tree_host_impl_->RegisterPictureLayerImpl(layer);
 }
 
 void LayerTreeImpl::UnregisterPictureLayerImpl(PictureLayerImpl* layer) {
   layer_tree_host_impl_->UnregisterPictureLayerImpl(layer);
 }
 
 }  // namespace cc