Remove Layer/LayerImpl's FixedContainerSizeDelta

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 3643cfef460a904c3ef67e5ae85ab08430392c39..7c516ba555c1b8509b2bf521373a0b3cac9f7349 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -376,15 +376,6 @@ bool LayerImpl::IsAffectedByPageScale() const {
       ->in_subtree_of_page_scale_layer;
 }
 
-gfx::Vector2dF LayerImpl::FixedContainerSizeDelta() const {
-  LayerImpl* scroll_clip_layer =
-      layer_tree_impl()->LayerById(scroll_clip_layer_id_);
-  if (!scroll_clip_layer)
-    return gfx::Vector2dF();
-
-  return scroll_clip_layer->ViewportBoundsDelta();
-}
-
 std::unique_ptr<base::DictionaryValue> LayerImpl::LayerTreeAsJson() {
   std::unique_ptr<base::DictionaryValue> result(new base::DictionaryValue);
   result->SetInteger("LayerId", id());