[SPv2] Track paint offset change

third_party/WebKit/Source/core/paint/BlockPainter.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/BlockPainter.h"
 
 #include "core/editing/DragCaretController.h"
 #include "core/editing/FrameSelection.h"
 #include "core/layout/LayoutFlexibleBox.h"
 #include "core/layout/LayoutInline.h"
@@ skipping 11 matching lines @@
 #include "core/paint/ScrollRecorder.h"
 #include "core/paint/ScrollableAreaPainter.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/ClipRecorder.h"
 #include "wtf/Optional.h"
 
 namespace blink {
 
 void BlockPainter::paint(const PaintInfo& paintInfo,
                          const LayoutPoint& paintOffset) {
+  ObjectPainter(m_layoutBlock).checkPaintOffset(paintInfo, paintOffset);
   LayoutPoint adjustedPaintOffset = paintOffset + m_layoutBlock.location();
   if (!intersectsPaintRect(paintInfo, adjustedPaintOffset))
     return;
 
   PaintInfo localPaintInfo(paintInfo);
   PaintPhase originalPhase = localPaintInfo.phase;
 
   // There are some cases where not all clipped visual overflow is accounted
   // for.
   // FIXME: reduce the number of such cases.
@@ skipping 256 matching lines @@
 }
 
 void BlockPainter::paintContents(const PaintInfo& paintInfo,
                                  const LayoutPoint& paintOffset) {
   DCHECK(!m_layoutBlock.childrenInline());
   PaintInfo paintInfoForDescendants = paintInfo.forDescendants();
   m_layoutBlock.paintChildren(paintInfoForDescendants, paintOffset);
 }
 
 }  // namespace blink