Fix up that no render SVG shape when change clip-path to visible after hidden.

third_party/WebKit/Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc.
  * All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
@@ skipping 1936 matching lines @@
   }
 
   DCHECK(oldStyle);
 
   if (localChange != NoChange)
     updateCallbackSelectors(oldStyle.get(), newStyle.get());
 
   if (LayoutObject* layoutObject = this->layoutObject()) {
     if (localChange != NoChange ||
         pseudoStyleCacheIsInvalid(oldStyle.get(), newStyle.get()) ||
-        svgFilterNeedsLayerUpdate()) {
+        svgFilterNeedsLayerUpdate() ||
+        (layoutObject->isSVG() && layoutObject->hasClipPath())) {

[fs, 2016/11/07 12:03:30]

This does not look right.

       layoutObject->setStyle(newStyle.get());
     } else {
       // Although no change occurred, we use the new style so that the cousin
       // style sharing code won't get fooled into believing this style is the
       // same.
       // FIXME: We may be able to remove this hack, see discussion in
       // https://codereview.chromium.org/30453002/
       layoutObject->setStyleInternal(newStyle.get());
     }
   }
@@ skipping 2125 matching lines @@
 }
 
 DEFINE_TRACE_WRAPPERS(Element) {
   if (hasRareData()) {
     visitor->traceWrappers(elementRareData());
   }
   ContainerNode::traceWrappers(visitor);
 }
 
 }  // namespace blink