Implement a simple version of SelectorQuery.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 197 matching lines @@
 {
     if (NthIndexCache* nthIndexCache = element.document().nthIndexCache())
         return nthIndexCache->nthLastChildIndexOfType(element, type);
 
     int index = 1;
     for (const Element* sibling = ElementTraversal::nextSibling(element, HasTagName(type)); sibling; sibling = ElementTraversal::nextSibling(*sibling, HasTagName(type)))
         ++index;
     return index;
 }
 
-bool SelectorChecker::match(const SelectorCheckingContext& context, MatchResult& result) const
-{
-    ASSERT(context.selector);
-    return matchSelector(context, result) == SelectorMatches;
-}
-
-bool SelectorChecker::match(const SelectorCheckingContext& context) const
-{
-    MatchResult ignoreResult;
-    return match(context, ignoreResult);
-}
-
 // Recursive check of selectors and combinators
 // It can return 4 different values:
 // * SelectorMatches          - the selector matches the element e
 // * SelectorFailsLocally     - the selector fails for the element e
 // * SelectorFailsAllSiblings - the selector fails for e and any sibling of e
 // * SelectorFailsCompletely  - the selector fails for e and any sibling or ancestor of e
 SelectorChecker::Match SelectorChecker::matchSelector(const SelectorCheckingContext& context, MatchResult& result) const
 {
     MatchResult subResult;
     if (!checkOne(context, subResult))
@@ skipping 951 matching lines @@
 }
 
 bool SelectorChecker::matchesFocusPseudoClass(const Element& element)
 {
     if (InspectorInstrumentation::forcePseudoState(const_cast<Element*>(&element), CSSSelector::PseudoFocus))
         return true;
     return element.focused() && isFrameFocused(element);
 }
 
 }