Fix DCHECK failure in ObjectPainter::doCheckPaintOffset() for SVG objects

third_party/WebKit/Source/core/paint/ObjectPainter.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/ObjectPainter.h"
 
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutTheme.h"
@@ skipping 681 matching lines @@
   m_layoutObject.paint(info, paintOffset);
   info.phase = PaintPhaseOutline;
   m_layoutObject.paint(info, paintOffset);
 }
 
 #if DCHECK_IS_ON()
 void ObjectPainter::doCheckPaintOffset(const PaintInfo& paintInfo,
                                        const LayoutPoint& paintOffset) {
   DCHECK(RuntimeEnabledFeatures::slimmingPaintV2Enabled());
 
+  // TODO(pdr,wangxianzhu): Refactor to avoid the special treatment for SVGText,
+  // SVGInline, SVGInlineText and SVGForeignObject.
+  if (m_layoutObject.isSVG() && !m_layoutObject.isSVGRoot() &&
+      !m_layoutObject.isSVGForeignObject()) {
+    if (!m_layoutObject.isSVGInline() && !m_layoutObject.isSVGInlineText())
+      DCHECK(paintOffset == LayoutPoint());
+    return;
+  }
+
   // TODO(pdr): Let painter and paint property tree builder generate the same
   // paint offset for LayoutScrollbarPart. crbug.com/664249.
   if (m_layoutObject.isLayoutScrollbarPart())
     return;
 
   LayoutPoint adjustedPaintOffset = paintOffset;
   if (m_layoutObject.isBox())
     adjustedPaintOffset += toLayoutBox(m_layoutObject).location();
   DCHECK(m_layoutObject.previousPaintOffset() == adjustedPaintOffset);
 }
 #endif
 
 }  // namespace blink