cc: Fix draw transform computation for non-drawn layers

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index bae7421deb5aad37de251ddbd569d82c7ef81bea..d2ad8b012dfab893206746893ecf07205e5e77e5 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -385,11 +385,10 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
   DrawProperties& draw_properties() { return draw_properties_; }
   const DrawProperties& draw_properties() const { return draw_properties_; }
 
+  gfx::Transform DrawTransform() const;
+
   // The following are shortcut accessors to get various information from
   // draw_properties_
-  const gfx::Transform& draw_transform() const {
-    return draw_properties_.target_space_transform;
-  }
   const gfx::Transform& screen_space_transform() const {
     return draw_properties_.screen_space_transform;
   }