Rename platform/Widget to platform/FrameViewBase in core.

third_party/WebKit/Source/core/layout/LayoutScrollbar.h

 /*
  * Copyright (C) 2008, 2009 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 59 matching lines @@
   void setVisualRect(const LayoutRect&) final;
 
   DECLARE_VIRTUAL_TRACE();
 
  protected:
   LayoutScrollbar(ScrollableArea*, ScrollbarOrientation, Element*);
 
  private:
   friend class Scrollbar;
 
-  void setParent(Widget*) override;
+  void setParent(FrameViewBase*) override;
   void setEnabled(bool) override;
 
   void setHoveredPart(ScrollbarPart) override;
   void setPressedPart(ScrollbarPart) override;
 
   void styleChanged() override;
 
   bool isCustomScrollbar() const override { return true; }
 
   void updateScrollbarParts(bool destroy = false);
 
   PassRefPtr<ComputedStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId);
   void updateScrollbarPart(ScrollbarPart, bool destroy = false);
 
   // The element that supplies our style information.
   Member<Element> m_styleSource;
 
   HashMap<unsigned, LayoutScrollbarPart*> m_parts;
 };
 
 DEFINE_TYPE_CASTS(LayoutScrollbar,
                   ScrollbarThemeClient,
                   scrollbar,
                   scrollbar->isCustomScrollbar(),
                   scrollbar.isCustomScrollbar());
 
 }  // namespace blink
 
 #endif  // LayoutScrollbar_h