Skip independent inherited property propagation to pseudo elements.

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 1884 matching lines @@
   }
 
   if (hasCustomStyleCallbacks())
     didRecalcStyle(change);
 }
 
 PassRefPtr<ComputedStyle> Element::propagateInheritedProperties(
     StyleRecalcChange change) {
   if (change != IndependentInherit)
     return nullptr;
+  if (isPseudoElement())
+    return nullptr;
   if (needsStyleRecalc())
     return nullptr;
   if (hasAnimations())
     return nullptr;
   const ComputedStyle* parentStyle = parentComputedStyle();
   DCHECK(parentStyle);
   const ComputedStyle* style = computedStyle();
   if (!style || style->animations() || style->transitions())
     return nullptr;
   RefPtr<ComputedStyle> newStyle = ComputedStyle::clone(*style);
@@ skipping 2173 matching lines @@
 }
 
 DEFINE_TRACE_WRAPPERS(Element) {
   if (hasRareData()) {
     visitor->traceWrappers(elementRareData());
   }
   ContainerNode::traceWrappers(visitor);
 }
 
 }  // namespace blink