Remove unused HashSet<>::isValidValue().

third_party/WebKit/Source/wtf/HashSet.h

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 92 matching lines @@
     //   static bool equal(const ValueType&, const T&);
     //   static translate(ValueType&, const T&, unsigned hashCode);
     template <typename HashTranslator, typename T> AddResult add(const T&);
 
     void remove(ValuePeekInType);
     void remove(iterator);
     void clear();
     template <typename Collection>
     void removeAll(const Collection& toBeRemoved) { WTF::removeAll(*this, toBeRemoved); }
 
-    static bool isValidValue(ValuePeekInType);
-
     ValuePassOutType take(iterator);
     ValuePassOutType take(ValuePeekInType);
     ValuePassOutType takeAny();
 
     template <typename VisitorDispatcher>
     void trace(VisitorDispatcher visitor) { m_impl.trace(visitor); }
 
 private:
     HashTableType m_impl;
 };
@@ skipping 98 matching lines @@
     remove(find(value));
 }
 
 template <typename T, typename U, typename V, typename W>
 inline void HashSet<T, U, V, W>::clear()
 {
     m_impl.clear();
 }
 
 template <typename T, typename U, typename V, typename W>
-inline bool HashSet<T, U, V, W>::isValidValue(ValuePeekInType value)
-{
-    if (ValueTraits::isDeletedValue(value))
-        return false;
-
-    if (HashFunctions::safeToCompareToEmptyOrDeleted) {
-        if (value == ValueTraits::emptyValue())
-            return false;
-    } else {
-        if (isHashTraitsEmptyValue<ValueTraits>(value))
-            return false;
-    }
-
-    return true;
-}
-
-template <typename T, typename U, typename V, typename W>
 inline typename HashSet<T, U, V, W>::ValuePassOutType HashSet<T, U, V, W>::take(iterator it)
 {
     if (it == end())
         return ValueTraits::emptyValue();
 
     ValuePassOutType result = ValueTraits::passOut(const_cast<ValueType&>(*it));
     remove(it);
 
     return result;
 }
@@ skipping 32 matching lines @@
 struct NeedsTracing<HashSet<T, U, V>> {
     static const bool value = false;
 };
 #endif
 
 } // namespace WTF
 
 using WTF::HashSet;
 
 #endif // WTF_HashSet_h