cc: Rename visible_content_rect and content stuff on quads.

cc/layers/layer.cc

Index: cc/layers/layer.cc
diff --git a/cc/layers/layer.cc b/cc/layers/layer.cc
index a210922c1cc57d716fc45dd6b2021c1939877498..04854b497b4f9ab206b15f71e05a232b1b35c6e5 100644
--- a/cc/layers/layer.cc
+++ b/cc/layers/layer.cc
@@ -1521,12 +1521,6 @@ void Layer::RemoveLayerAnimationEventObserver(
   layer_animation_controller_->RemoveEventObserver(animation_observer);
 }
 
-SimpleEnclosedRegion Layer::VisibleContentOpaqueRegion() const {
-  if (contents_opaque())
-    return SimpleEnclosedRegion(visible_content_rect());
-  return SimpleEnclosedRegion();
-}
-
 ScrollbarLayerInterface* Layer::ToScrollbarLayer() {
   return nullptr;
 }