[Refactor] Moved scrollbar creation and deletion to ScrollbarManager

third_party/WebKit/Source/core/paint/ScrollbarManager.h

Index: third_party/WebKit/Source/core/paint/ScrollbarManager.h
diff --git a/third_party/WebKit/Source/core/paint/ScrollbarManager.h b/third_party/WebKit/Source/core/paint/ScrollbarManager.h
index 09dac5b1349693cf1ad31b006eeb7abf0c6d846d..01f2dcd0977ff9ca5920f676f86b4b3d0f6c0775 100644
--- a/third_party/WebKit/Source/core/paint/ScrollbarManager.h
+++ b/third_party/WebKit/Source/core/paint/ScrollbarManager.h
@@ -34,11 +34,9 @@ class CORE_EXPORT ScrollbarManager {
 
   DECLARE_VIRTUAL_TRACE();
 
- protected:
-  // TODO(ymalik): This can be made non-virtual since there's a lot of
-  // common code in subclasses.
-  virtual Scrollbar* CreateScrollbar(ScrollbarOrientation) = 0;
-  virtual void DestroyScrollbar(ScrollbarOrientation) = 0;
+  Scrollbar* CreateScrollbar(ScrollbarOrientation);
+
+  void DestroyScrollbar(ScrollbarOrientation);
 
  protected:
   Member<ScrollableArea> scrollable_area_;