Delete widget tree (FrameView::parent_)

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
    reserved.
 
    This library is free software; you can redistribute it and/or
@@ skipping 475 matching lines @@
   }  // Whether or not we have been explicitly marked as visible or not.
   bool IsParentVisible() const {
     return parent_visible_;
   }  // Whether or not our parent is visible.
   bool IsVisible() const {
     return self_visible_ && parent_visible_;
   }  // Whether or not we are actually visible.
   void SetParentVisible(bool) override;
   void SetSelfVisible(bool v) { self_visible_ = v; }
   void SetParent(FrameView*) override;
-  FrameView* Parent() const override { return parent_; }
+  FrameView* Parent() const override;
+  void SetFrameOrPluginState(FrameOrPluginState) override;
+  FrameOrPluginState GetFrameOrPluginState() const override {
+    return frame_view_state_;
+  }
   void RemoveChild(FrameOrPlugin*);
   using PluginSet = HeapHashSet<Member<PluginView>>;
   const PluginSet& Plugins() const { return plugins_; }
   void AddPlugin(PluginView*);
   // Custom scrollbars in PaintLayerScrollableArea need to be called with
   // StyleChanged whenever window focus is changed.
   void RemoveScrollbar(Scrollbar*);
   void AddScrollbar(Scrollbar*);
 
   // If the scroll view does not use a native widget, then it will have
@@ skipping 563 matching lines @@
   EmbeddedObjectSet part_update_set_;
 
   // FIXME: These are just "children" of the FrameView and should be
   // Member<FrameView> instead.
   HashSet<RefPtr<LayoutPart>> parts_;
 
   Member<LocalFrame> frame_;
 
   IntRect frame_rect_;
   Member<FrameView> parent_;
+  FrameOrPluginState frame_view_state_;
   bool self_visible_;
   bool parent_visible_;
 
   WebDisplayMode display_mode_;
 
   DisplayShape display_shape_;
 
   bool can_have_scrollbars_;
 
   bool has_pending_layout_;
@@ skipping 189 matching lines @@
                   frame_or_plugin.IsFrameView());
 DEFINE_TYPE_CASTS(FrameView,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->IsFrameView(),
                   scrollableArea.IsFrameView());
 
 }  // namespace blink
 
 #endif  // FrameView_h