MacViews: Overlay Scrollbars with Show/Hide Animations

ui/views/controls/scrollbar/native_scroll_bar.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/controls/scrollbar/native_scroll_bar.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/message_loop/message_loop.h"
@@ skipping 23 matching lines @@
   return NativeScrollBarWrapper::GetHorizontalScrollBarHeight(theme);
 }
 
 // static
 int NativeScrollBar::GetVerticalScrollBarWidth(
     const ui::NativeTheme* theme) {
   return NativeScrollBarWrapper::GetVerticalScrollBarWidth(theme);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// NativeScrollBar, protected:
+NativeScrollBarWrapper* NativeScrollBar::CreateWrapper() {
+  return NativeScrollBarWrapper::CreateWrapper(this);
+}
+
+////////////////////////////////////////////////////////////////////////////////
 // NativeScrollBar, View overrides:
 gfx::Size NativeScrollBar::GetPreferredSize() const {
   if (native_wrapper_)
     return native_wrapper_->GetView()->GetPreferredSize();
   return gfx::Size();
 }
 
 void NativeScrollBar::Layout() {
   if (native_wrapper_) {
     native_wrapper_->GetView()->SetBounds(0, 0, width(), height());
     native_wrapper_->GetView()->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());
   }
 }
 
 const char* NativeScrollBar::GetClassName() const {
   return kViewClassName;
 }
 
 // Overridden from View for keyboard UI.
 bool NativeScrollBar::OnKeyPressed(const ui::KeyEvent& event) {
@@ skipping 32 matching lines @@
 }
 
 int NativeScrollBar::GetPosition() const {
   if (!native_wrapper_)
     return 0;
   return native_wrapper_->GetPosition();
 }
 
 }  // namespace views