Simplify and solidify FrameView dirty layout check

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
    modify it under the terms of the GNU Library General Public
@@ skipping 895 matching lines @@
     // TODO(trchen): This will not be needed once settings->rootLayerScrolls() is enabled.
     RefPtr<ClipPaintPropertyNode> m_contentClip;
 
     // This is set on the local root frame view only.
     DocumentLifecycle::LifecycleState m_currentUpdateLifecyclePhasesTargetState;
 
     ScrollAnchor m_scrollAnchor;
 
     bool m_needsScrollbarsUpdate;
     bool m_suppressAdjustViewSize;
-    bool m_inPluginUpdate;
-    bool m_inForcedLayoutByChildEmbeddedReplacedContent;
     bool m_allowsLayoutInvalidationAfterLayoutClean;
 
     // For testing.
     struct ObjectPaintInvalidation {
         String name;
         PaintInvalidationReason reason;
     };
     std::unique_ptr<Vector<ObjectPaintInvalidation>> m_trackedObjectPaintInvalidations;
 };
 
@@ skipping 19 matching lines @@
     if (m_visuallyNonEmptyPixelCount > visualPixelThreshold)
         setIsVisuallyNonEmpty();
 }
 
 DEFINE_TYPE_CASTS(FrameView, Widget, widget, widget->isFrameView(), widget.isFrameView());
 DEFINE_TYPE_CASTS(FrameView, ScrollableArea, scrollableArea, scrollableArea->isFrameView(), scrollableArea.isFrameView());
 
 } // namespace blink
 
 #endif // FrameView_h