Note scrollbar layer properties changed when position changes.

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 480cee0db3683360c8419e65cc2c564d09ca2c90..b78cf1a45a80fb195489e303a64a0cea66d22a93 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -833,13 +833,13 @@ void LayerImpl::UpdateScrollbarPositions() {
   if (horizontal_scrollbar_layer_) {
     horizontal_scrollbar_layer_->SetCurrentPos(current_offset.x());
     horizontal_scrollbar_layer_->SetMaximum(max_scroll_offset_.x());
-    horizontal_scrollbar_layer_->set_visible_to_total_length_ratio(
+    horizontal_scrollbar_layer_->SetVisibleToTotalLengthRatio(
         viewport.width() / scrollable_size.width());
   }
   if (vertical_scrollbar_layer_) {
     vertical_scrollbar_layer_->SetCurrentPos(current_offset.y());
     vertical_scrollbar_layer_->SetMaximum(max_scroll_offset_.y());
-    vertical_scrollbar_layer_->set_visible_to_total_length_ratio(
+    vertical_scrollbar_layer_->SetVisibleToTotalLengthRatio(
         viewport.height() / scrollable_size.height());
   }