Scrollbar no longer inherits from FrameViewBase.

third_party/WebKit/Source/platform/exported/WebScrollbarThemeClientImpl.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 45 matching lines @@
 }
 
 IntSize WebScrollbarThemeClientImpl::Size() const {
   return scrollbar_.Size();
 }
 
 IntPoint WebScrollbarThemeClientImpl::Location() const {
   return scrollbar_.Location();
 }
 
-FrameViewBase* WebScrollbarThemeClientImpl::Parent() const {
-  // Unused by Chromium scrollbar themes.
-  NOTREACHED();
-  return 0;
-}
-
-FrameViewBase* WebScrollbarThemeClientImpl::Root() const {
-  // Unused by Chromium scrollbar themes.
-  NOTREACHED();
-  return 0;
-}
-
 void WebScrollbarThemeClientImpl::SetFrameRect(const IntRect&) {
   // Unused by Chromium scrollbar themes.
   NOTREACHED();
 }
 
 IntRect WebScrollbarThemeClientImpl::FrameRect() const {
   return IntRect(Location(), Size());
 }
 
 void WebScrollbarThemeClientImpl::Invalidate() {
@@ skipping 99 matching lines @@
 float WebScrollbarThemeClientImpl::ElasticOverscroll() const {
   return scrollbar_.ElasticOverscroll();
 }
 
 void WebScrollbarThemeClientImpl::SetElasticOverscroll(
     float elastic_overscroll) {
   return scrollbar_.SetElasticOverscroll(elastic_overscroll);
 }
 
 }  // namespace blink