Remove FrameViewBase as base class of PluginView.

third_party/WebKit/Source/platform/scroll/Scrollbar.cpp

 /*
  * Copyright (C) 2004, 2006, 2008 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 140 matching lines @@
   total_size_ = total_size;
 
   SetNeedsPaintInvalidation(kAllParts);
 }
 
 void Scrollbar::Paint(GraphicsContext& context,
                       const CullRect& cull_rect) const {
   if (!cull_rect.IntersectsCullRect(FrameRect()))
     return;
 
-  if (!GetTheme().Paint(*this, context, cull_rect))
-    FrameViewBase::Paint(context, cull_rect);
+  GetTheme().Paint(*this, context, cull_rect);
 }
 
 void Scrollbar::AutoscrollTimerFired(TimerBase*) {
   AutoscrollPressedPart(GetTheme().AutoscrollTimerDelay());
 }
 
 bool Scrollbar::ThumbWillBeUnderMouse() const {
   int thumb_pos = GetTheme().TrackPosition(*this) +
                   GetTheme().ThumbPosition(*this, ScrollableAreaTargetPos());
   int thumb_length = GetTheme().ThumbLength(*this);
@@ skipping 468 matching lines @@
     invalid_parts = kAllParts;
   if (invalid_parts & ~kThumbPart)
     track_needs_repaint_ = true;
   if (invalid_parts & kThumbPart)
     thumb_needs_repaint_ = true;
   if (scrollable_area_)
     scrollable_area_->SetScrollbarNeedsPaintInvalidation(Orientation());
 }
 
 }  // namespace blink