Handle ::content and :host-context correctly in SelectorQuery.

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)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2764 matching lines @@
 
 LayoutObject* Element::pseudoElementLayoutObject(PseudoId pseudoId) const
 {
     if (PseudoElement* element = pseudoElement(pseudoId))
         return element->layoutObject();
     return nullptr;
 }
 
 bool Element::matches(const String& selectors, ExceptionState& exceptionState)
 {
-    updateDistribution();
     SelectorQuery* selectorQuery = document().selectorQueryCache().add(AtomicString(selectors), document(), exceptionState);
     if (!selectorQuery)
         return false;
     return selectorQuery->matches(*this);
 }
 
 Element* Element::closest(const String& selectors, ExceptionState& exceptionState)
 {
     SelectorQuery* selectorQuery = document().selectorQueryCache().add(AtomicString(selectors), document(), exceptionState);
     if (!selectorQuery)
@@ skipping 674 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink