Delete widget tree (FrameView::parent_)

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RemoteFrameView_h
 #define RemoteFrameView_h
 
 #include "core/frame/FrameOrPlugin.h"
 #include "core/frame/FrameView.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class CullRect;
 class GraphicsContext;
 class RemoteFrame;
 
 class RemoteFrameView final : public GarbageCollectedFinalized<RemoteFrameView>,
                               public FrameOrPlugin {
   USING_GARBAGE_COLLECTED_MIXIN(RemoteFrameView);
 
  public:
   static RemoteFrameView* Create(RemoteFrame*);
 
   ~RemoteFrameView() override;
 
   void SetParent(FrameView*) override;
-  FrameView* Parent() const override { return parent_; }
+  FrameView* Parent() const override;
+  void SetFrameOrPluginState(FrameOrPluginState) override;
+  FrameOrPluginState GetFrameOrPluginState() const {
+    return remote_frame_view_state_;
+  }
+  FrameView* ParentFrameView() const;
 
   RemoteFrame& GetFrame() const {
     DCHECK(remote_frame_);
     return *remote_frame_;
   }
 
   void Dispose() override;
   // Override to notify remote frame that its viewport size has changed.
   void FrameRectsChanged() override;
   void InvalidateRect(const IntRect&);
@@ skipping 12 matching lines @@
   explicit RemoteFrameView(RemoteFrame*);
 
   IntRect ConvertFromRootFrame(const IntRect&) const;
 
   // The properties and handling of the cycle between RemoteFrame
   // and its RemoteFrameView corresponds to that between LocalFrame
   // and FrameView. Please see the FrameView::m_frame comment for
   // details.
   Member<RemoteFrame> remote_frame_;
   Member<FrameView> parent_;
+  FrameOrPluginState remote_frame_view_state_;
   IntRect last_viewport_intersection_;
   IntRect frame_rect_;
   bool self_visible_;
   bool parent_visible_;
 };
 
 }  // namespace blink
 
 #endif  // RemoteFrameView_h