[cc] Make LayerImpls point at LayerTreeImpl instead of LTHI

cc/delegated_renderer_layer.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/delegated_renderer_layer.h"
 
 #include "cc/delegated_renderer_layer_impl.h"
 
 namespace cc {
 
 scoped_refptr<DelegatedRendererLayer> DelegatedRendererLayer::create()
 {
     return scoped_refptr<DelegatedRendererLayer>(new DelegatedRendererLayer());
 }
 
 DelegatedRendererLayer::DelegatedRendererLayer()
     : Layer()
 {
     setIsDrawable(true);
     setMasksToBounds(true);
 }
 
 DelegatedRendererLayer::~DelegatedRendererLayer()
 {
 }
 
-scoped_ptr<LayerImpl> DelegatedRendererLayer::createLayerImpl(LayerTreeHostImpl* hostImpl)
+scoped_ptr<LayerImpl> DelegatedRendererLayer::createLayerImpl(LayerTreeImpl* treeImpl)
 {
-    return DelegatedRendererLayerImpl::create(hostImpl, m_layerId).PassAs<LayerImpl>();
+    return DelegatedRendererLayerImpl::create(treeImpl, m_layerId).PassAs<LayerImpl>();
 }
 
 }  // namespace cc