[cc] Make LayerImpls point at LayerTreeImpl instead of LTHI

cc/heads_up_display_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/heads_up_display_layer.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/heads_up_display_layer_impl.h"
 #include "cc/layer_tree_host.h"
 
@@ skipping 41 matching lines @@
 {
     return true;
 }
 
 void HeadsUpDisplayLayer::setFontAtlas(scoped_ptr<FontAtlas> fontAtlas)
 {
     m_fontAtlas = fontAtlas.Pass();
     m_hasFontAtlas = true;
 }
 
-scoped_ptr<LayerImpl> HeadsUpDisplayLayer::createLayerImpl(LayerTreeHostImpl* hostImpl)
+scoped_ptr<LayerImpl> HeadsUpDisplayLayer::createLayerImpl(LayerTreeImpl* treeImpl)
 {
-    return HeadsUpDisplayLayerImpl::create(hostImpl, m_layerId).PassAs<LayerImpl>();
+    return HeadsUpDisplayLayerImpl::create(treeImpl, m_layerId).PassAs<LayerImpl>();
 }
 
 void HeadsUpDisplayLayer::pushPropertiesTo(LayerImpl* layerImpl)
 {
     Layer::pushPropertiesTo(layerImpl);
 
     if (!m_fontAtlas)
         return;
 
     HeadsUpDisplayLayerImpl* hudLayerImpl = static_cast<HeadsUpDisplayLayerImpl*>(layerImpl);
     hudLayerImpl->setFontAtlas(m_fontAtlas.Pass());
 }
 
 }  // namespace cc