[Ash] Copy alpha_shape when recreating layers.

ui/compositor/layer.cc

 // Copyright (c) 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 "ui/compositor/layer.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 333 matching lines @@
   }
 }
 
 void Layer::SetBackgroundZoom(float zoom, int inset) {
   zoom_ = zoom;
   zoom_inset_ = inset;
 
   SetLayerBackgroundFilters();
 }
 
+SkRegion* Layer::alpha_shape() const {
+  return alpha_shape_.get();

[danakj, 2014/09/09 14:58:58]

move this to the .h

[jackhou1, 2014/09/10 00:51:54]

Done.

+}
+
 void Layer::SetAlphaShape(scoped_ptr<SkRegion> region) {
   alpha_shape_ = region.Pass();
 
   SetLayerFilters();
 }
 
 void Layer::SetLayerFilters() {
   cc::FilterOperations filters;
   if (layer_saturation_) {
     filters.Append(cc::FilterOperation::CreateSaturateFilter(
@@ skipping 675 matching lines @@
       children_.end(),
       std::bind2nd(std::mem_fun(&Layer::RemoveAnimatorsInTreeFromCollection),
                    collection));
 }
 
 bool Layer::IsAnimating() const {
   return animator_.get() && animator_->is_animating();
 }
 
 }  // namespace ui