cc: Pass LayerTreeHostImpl to LayerImpl constructor

cc/tree_synchronizer.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/tree_synchronizer.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/layer.h"
 #include "cc/layer_impl.h"
 #include "cc/scrollbar_animation_controller.h"
@@ skipping 26 matching lines @@
     for (size_t i = 0; i < children.size(); ++i)
         collectExistingLayerImplRecursive(oldLayers, children.take(i));
 
     collectExistingLayerImplRecursive(oldLayers, layerImpl->m_maskLayer.Pass());
     collectExistingLayerImplRecursive(oldLayers, layerImpl->m_replicaLayer.Pass());
 
     int id = layerImpl->id();
     oldLayers.set(id, layerImpl.Pass());
 }
 
-scoped_ptr<LayerImpl> TreeSynchronizer::reuseOrCreateLayerImpl(RawPtrLayerImplMap& newLayers, ScopedPtrLayerImplMap& oldLayers, Layer* layer)
+scoped_ptr<LayerImpl> TreeSynchronizer::reuseOrCreateLayerImpl(RawPtrLayerImplMap& newLayers, ScopedPtrLayerImplMap& oldLayers, Layer* layer, LayerTreeHostImpl* hostImpl)
 {
     scoped_ptr<LayerImpl> layerImpl = oldLayers.take(layer->id());
 
     if (!layerImpl)
-        layerImpl = layer->createLayerImpl();
+        layerImpl = layer->createLayerImpl(hostImpl);
 
     newLayers[layer->id()] = layerImpl.get();
     return layerImpl.Pass();
 }
 
 scoped_ptr<LayerImpl> TreeSynchronizer::synchronizeTreeRecursive(RawPtrLayerImplMap& newLayers, ScopedPtrLayerImplMap& oldLayers, Layer* layer, LayerTreeHostImpl* hostImpl)
 {
     if (!layer)
         return scoped_ptr<LayerImpl>();
 
-    scoped_ptr<LayerImpl> layerImpl = reuseOrCreateLayerImpl(newLayers, oldLayers, layer);
+    scoped_ptr<LayerImpl> layerImpl = reuseOrCreateLayerImpl(newLayers, oldLayers, layer, hostImpl);
 
     layerImpl->clearChildList();
     const std::vector<scoped_refptr<Layer> >& children = layer->children();
     for (size_t i = 0; i < children.size(); ++i)
         layerImpl->addChild(synchronizeTreeRecursive(newLayers, oldLayers, children[i].get(), hostImpl));
 
     layerImpl->setMaskLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->maskLayer(), hostImpl));
     layerImpl->setReplicaLayer(synchronizeTreeRecursive(newLayers, oldLayers, layer->replicaLayer(), hostImpl));
 
     layer->pushPropertiesTo(layerImpl.get());
-    layerImpl->setLayerTreeHostImpl(hostImpl);
 
     // Remove all dangling pointers. The pointers will be setup later in updateScrollbarLayerPointersRecursive phase
     if (ScrollbarAnimationController* scrollbarController = layerImpl->scrollbarAnimationController()) {
         scrollbarController->setHorizontalScrollbarLayer(0);
         scrollbarController->setVerticalScrollbarLayer(0);
     }
 
     return layerImpl.Pass();
 }
 
@@ skipping 18 matching lines @@
     DCHECK(scrollbarLayerImpl);
     DCHECK(scrollLayerImpl);
 
     if (scrollbarLayerImpl->orientation() == WebKit::WebScrollbar::Horizontal)
         scrollLayerImpl->setHorizontalScrollbarLayer(scrollbarLayerImpl);
     else
         scrollLayerImpl->setVerticalScrollbarLayer(scrollbarLayerImpl);
 }
 
 }  // namespace cc