No pseudo elements in SelectorChecker::Mode QueryingRules.

third_party/WebKit/Source/core/css/CSSSelector.cpp

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  *               2001 Andreas Schlapbach (schlpbch@iam.unibe.ch)
  *               2001-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 863 matching lines @@
     m_data.m_rareData->m_bits.m_nth.m_a = a;
     m_data.m_rareData->m_bits.m_nth.m_b = b;
 }
 
 bool CSSSelector::matchNth(int count) const
 {
     ASSERT(m_hasRareData);
     return m_data.m_rareData->matchNth(count);
 }
 
+bool CSSSelector::matchesPseudoElement() const
+{
+    for (const CSSSelector* current = this; current; current = current->tagHistory()) {
+        if (current->match() == PseudoElement)
+            return true;
+        if (current->relation() != SubSelector)
+            return false;
+    }
+    return false;
+}
+
 CSSSelector::RareData::RareData(const AtomicString& value)
     : m_matchingValue(value)
     , m_serializingValue(value)
     , m_bits()
     , m_attribute(anyQName())
     , m_argument(nullAtom)
 {
 }
 
 CSSSelector::RareData::~RareData()
 {
 }
 
 // a helper function for checking nth-arguments
 bool CSSSelector::RareData::matchNth(int count)
 {
     if (!nthAValue())
         return count == nthBValue();
     if (nthAValue() > 0) {
         if (count < nthBValue())
             return false;
         return (count - nthBValue()) % nthAValue() == 0;
     }
     if (count > nthBValue())
         return false;
     return (nthBValue() - count) % (-nthAValue()) == 0;
 }
 
 } // namespace blink