MacViews: Overlay Scrollbars with Show/Hide Animations

ui/views/controls/scrollbar/native_scroll_bar.cc

Index: ui/views/controls/scrollbar/native_scroll_bar.cc
diff --git a/ui/views/controls/scrollbar/native_scroll_bar.cc b/ui/views/controls/scrollbar/native_scroll_bar.cc
index a768af5e52edd160ec5fa8d56697af4a424a42f1..fd514ca6af82a255f2e2868cbf41fdbec9812780 100644
--- a/ui/views/controls/scrollbar/native_scroll_bar.cc
+++ b/ui/views/controls/scrollbar/native_scroll_bar.cc
@@ -41,6 +41,12 @@ int NativeScrollBar::GetVerticalScrollBarWidth(
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// NativeScrollBar, protected:
+NativeScrollBarWrapper* NativeScrollBar::CreateWrapper() {
+  return NativeScrollBarWrapper::CreateWrapper(this);
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // NativeScrollBar, View overrides:
 gfx::Size NativeScrollBar::GetPreferredSize() const {
   if (native_wrapper_)
@@ -58,7 +64,8 @@ void NativeScrollBar::Layout() {
 void NativeScrollBar::ViewHierarchyChanged(
     const ViewHierarchyChangedDetails& details) {
   if (details.is_add && !native_wrapper_ && GetWidget()) {
-    native_wrapper_ = NativeScrollBarWrapper::CreateWrapper(this);
+    native_wrapper_ = CreateWrapper();
+
     AddChildView(native_wrapper_->GetView());
   }
 }