Fixed clip resize for document.rootScroller with inertTopControls

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 396 matching lines @@
   void invalidatePaintForTickmarks();
 
   // Since the compositor can resize the viewport due to browser controls and
   // commit scroll offsets before a WebView::resize occurs, we need to adjust
   // our scroll extents to prevent clamping the scroll offsets.
   void setBrowserControlsViewportAdjustment(float);
   IntSize browserControlsSize() const {
     return IntSize(0, ceilf(m_browserControlsViewportAdjustment));
   }
 
+  PaintLayer* layer() const override;
+
   IntSize maximumScrollOffsetInt() const override;
 
   // ScrollableArea interface
   void getTickmarks(Vector<IntRect>&) const override;
   IntRect scrollableAreaBoundingBox() const override;
   bool scrollAnimatorEnabled() const override;
   bool usesCompositedScrolling() const override;
   bool shouldScrollOnMainThread() const override;
   GraphicsLayer* layerForScrolling() const override;
   GraphicsLayer* layerForHorizontalScrollbar() const override;
@@ skipping 721 matching lines @@
                   widget.isFrameView());
 DEFINE_TYPE_CASTS(FrameView,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->isFrameView(),
                   scrollableArea.isFrameView());
 
 }  // namespace blink
 
 #endif  // FrameView_h