Deleted Widget/FrameViewBase

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

 /*
  * 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 81 matching lines @@
   visitor->Trace(style_source_);
   Scrollbar::Trace(visitor);
 }
 
 LayoutBox* LayoutScrollbar::StyleSource() const {
   return style_source_ && style_source_->GetLayoutObject()
              ? style_source_->GetLayoutObject()->EnclosingBox()
              : 0;
 }
 
-void LayoutScrollbar::SetParent(FrameViewBase* parent) {
-  Scrollbar::SetParent(parent);
-  if (!parent) {
-    // Destroy all of the scrollbar's LayoutBoxes.
-    UpdateScrollbarParts(true);
-  }
+void LayoutScrollbar::DisconnectFromScrollableArea() {
+  UpdateScrollbarParts(true);
+  Scrollbar::DisconnectFromScrollableArea();
 }
 
 void LayoutScrollbar::SetEnabled(bool e) {
   bool was_enabled = Enabled();
   Scrollbar::SetEnabled(e);
   if (was_enabled != e)
     UpdateScrollbarParts();
 }
 
 void LayoutScrollbar::StyleChanged() {
@@ skipping 273 matching lines @@
   }
 }
 
 void LayoutScrollbar::SetVisualRect(const LayoutRect& rect) {
   Scrollbar::SetVisualRect(rect);
   for (auto& part : parts_)
     part.value->SetVisualRect(rect);
 }
 
 }  // namespace blink