Fix SurfaceLayerImpl scale under impl-side painting

cc/layers/surface_layer.cc

Index: cc/layers/surface_layer.cc
diff --git a/cc/layers/surface_layer.cc b/cc/layers/surface_layer.cc
index dc88810dc8aefa2258505cee6e5de754af4c0ae3..e1862303caac1e4e6e02c8c70e119d722d8257ba 100644
--- a/cc/layers/surface_layer.cc
+++ b/cc/layers/surface_layer.cc
@@ -94,15 +94,8 @@ void SurfaceLayer::PushPropertiesTo(LayerImpl* layer) {
   SurfaceLayerImpl* layer_impl = static_cast<SurfaceLayerImpl*>(layer);
 
   layer_impl->SetSurfaceId(surface_id_);
-}
-
-void SurfaceLayer::CalculateContentsScale(float ideal_contents_scale,
-                                          float* contents_scale_x,
-                                          float* contents_scale_y,
-                                          gfx::Size* content_bounds) {
-  *content_bounds = surface_size_;
-  *contents_scale_x = surface_scale_;
-  *contents_scale_y = surface_scale_;
+  layer_impl->SetSurfaceSize(surface_size_);
+  layer_impl->SetSurfaceScale(surface_scale_);
 }
 
 void SurfaceLayer::CreateNewDestroySequence() {