[cc] Make LayerImpls point at LayerTreeImpl instead of LTHI

cc/video_layer.cc

Index: cc/video_layer.cc
diff --git a/cc/video_layer.cc b/cc/video_layer.cc
index 05f2c16f7191379dea173cf5a00a0fc6db506b2e..9ba8a28e88d431c06556607c926d13a1cf81f3bd 100644
--- a/cc/video_layer.cc
+++ b/cc/video_layer.cc
@@ -27,9 +27,9 @@ VideoLayer::~VideoLayer()
 {
 }
 
-scoped_ptr<LayerImpl> VideoLayer::createLayerImpl(LayerTreeHostImpl* hostImpl)
+scoped_ptr<LayerImpl> VideoLayer::createLayerImpl(LayerTreeImpl* treeImpl)
 {
-    return VideoLayerImpl::create(hostImpl, m_layerId, m_provider, m_unwrapper).PassAs<LayerImpl>();
+    return VideoLayerImpl::create(treeImpl, m_layerId, m_provider, m_unwrapper).PassAs<LayerImpl>();
 }
 
 }  // namespace cc