Verify paintedOutputOfObjectHasNoEffectRegardlessOfSize during painting

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1008 matching lines @@
   LayoutBlock* block = containingBlock();
   if (block)
     block->adjustChildDebugRect(rect);
 
   rect.setWidth(LayoutUnit(viewWidth(IncludeScrollbars)));
   rect.setHeight(LayoutUnit(viewHeight(IncludeScrollbars)));
 
   return rect;
 }
 
+bool LayoutView::paintedOutputOfObjectHasNoEffectRegardlessOfSize() const {
+  // Frame scroll corner is painted using LayoutView as the display item client.
+  if (!RuntimeEnabledFeatures::rootLayerScrollingEnabled() &&
+      (frameView()->horizontalScrollbar() || frameView()->verticalScrollbar()))
+    return false;
+
+  return LayoutBlockFlow::paintedOutputOfObjectHasNoEffectRegardlessOfSize();
+}
+
 }  // namespace blink