[cc] Make LayerImpls point at LayerTreeImpl instead of LTHI

cc/io_surface_layer_impl.h

Index: cc/io_surface_layer_impl.h
diff --git a/cc/io_surface_layer_impl.h b/cc/io_surface_layer_impl.h
index f7d4a58254ec9f7cd6d961129eb170be3f9ca515..1ca671def7465730462b61ed43107ea2d87104dc 100644
--- a/cc/io_surface_layer_impl.h
+++ b/cc/io_surface_layer_impl.h
@@ -13,9 +13,9 @@ namespace cc {
 
 class CC_EXPORT IOSurfaceLayerImpl : public LayerImpl {
 public:
-    static scoped_ptr<IOSurfaceLayerImpl> create(LayerTreeHostImpl* hostImpl, int id)
+    static scoped_ptr<IOSurfaceLayerImpl> create(LayerTreeImpl* treeImpl, int id)
     {
-        return make_scoped_ptr(new IOSurfaceLayerImpl(hostImpl, id));
+        return make_scoped_ptr(new IOSurfaceLayerImpl(treeImpl, id));
     }
     virtual ~IOSurfaceLayerImpl();
 
@@ -29,7 +29,7 @@ public:
     virtual void dumpLayerProperties(std::string*, int indent) const OVERRIDE;
 
 private:
-    IOSurfaceLayerImpl(LayerTreeHostImpl* hostImpl, int id);
+    IOSurfaceLayerImpl(LayerTreeImpl* treeImpl, int id);
 
     virtual const char* layerTypeAsString() const OVERRIDE;