Move LayerImpl's bounds_delta to property trees

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 6965594181cb0a4dd868f89b7894ae6e36d2fdfa..4a5f3f58f904181bf0d71ed5f1e4f656b04ee7b4 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1945,7 +1945,7 @@ void LayerTreeHostImpl::UpdateViewportContainerSizes() {
   // for changes in the size (e.g. browser controls) since the last resize from
   // Blink.
   gfx::Vector2dF amount_to_expand(0.f, delta_from_top_controls);
-  inner_container->SetBoundsDelta(amount_to_expand);
+  inner_container->SetViewportBoundsDelta(amount_to_expand);
 
   if (outer_container && !outer_container->BoundsForScrolling().IsEmpty()) {
     // Adjust the outer viewport container as well, since adjusting only the
@@ -1953,8 +1953,8 @@ void LayerTreeHostImpl::UpdateViewportContainerSizes() {
     // clamping.
     gfx::Vector2dF amount_to_expand_scaled = gfx::ScaleVector2d(
         amount_to_expand, 1.f / active_tree_->min_page_scale_factor());
-    outer_container->SetBoundsDelta(amount_to_expand_scaled);
-    active_tree_->InnerViewportScrollLayer()->SetBoundsDelta(
+    outer_container->SetViewportBoundsDelta(amount_to_expand_scaled);
+    active_tree_->InnerViewportScrollLayer()->SetViewportBoundsDelta(
         amount_to_expand_scaled);
 
     anchor.ResetViewportToAnchoredPosition();