[SPv2] Track paint offset change

third_party/WebKit/Source/core/paint/FrameSetPainter.cpp

 // 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.
 
 #include "core/paint/FrameSetPainter.h"
 
 #include "core/html/HTMLFrameSetElement.h"
 #include "core/layout/LayoutFrameSet.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
+#include "core/paint/ObjectPainter.h"
 #include "core/paint/PaintInfo.h"
 
 namespace blink {
 
 static Color borderStartEdgeColor() {
   return Color(170, 170, 170);
 }
 
 static Color borderEndEdgeColor() {
   return Color::black;
@@ skipping 123 matching lines @@
         child->paint(paintInfo, adjustedPaintOffset);
       child = child->nextSibling();
       if (!child)
         return;
     }
   }
 }
 
 void FrameSetPainter::paint(const PaintInfo& paintInfo,
                             const LayoutPoint& paintOffset) {
+  ObjectPainter(m_layoutFrameSet).checkPaintOffset(paintInfo, paintOffset);
   if (paintInfo.phase != PaintPhaseForeground)
     return;
 
   LayoutObject* child = m_layoutFrameSet.firstChild();
   if (!child)
     return;
 
   LayoutPoint adjustedPaintOffset = paintOffset + m_layoutFrameSet.location();
   paintChildren(paintInfo, adjustedPaintOffset);
   paintBorders(paintInfo, adjustedPaintOffset);
 }
 
 }  // namespace blink