Mark DOMStringList.contains() as deprecated, add console warning.

Source/core/dom/DOMStringList.cpp

 /*
  * Copyright (C) 2010 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
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  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 #include "config.h"
 #include "core/dom/DOMStringList.h"
+#include "core/dom/ExecutionContext.h"
+#include "core/frame/UseCounter.h"
 #include <algorithm>
 
 namespace blink {
 
-String DOMStringList::item(unsigned index) const
+String DOMStringList::anonymousIndexedGetter(unsigned index) const
 {
     if (index >= m_strings.size())
         return String();
     return m_strings[index];
 }
 
-bool DOMStringList::contains(const String& string) const
+
+String DOMStringList::item(ExecutionContext* context, unsigned index) const
 {
+    switch (m_source) {
+    case DOMStringList::IndexedDB:
+        UseCounter::count(context, UseCounter::DOMStringList_Item_AttributeGetter_IndexedDB);
+        break;
+    case DOMStringList::Location:
+        UseCounter::count(context, UseCounter::DOMStringList_Item_AttributeGetter_Location);
+        break;
+    default:
+        ASSERT_NOT_REACHED();
+    }
+
+    return anonymousIndexedGetter(index);
+}
+
+bool DOMStringList::contains(ExecutionContext* context, const String& string) const
+{
+    switch (m_source) {
+    case DOMStringList::IndexedDB:
+        UseCounter::count(context, UseCounter::DOMStringList_Contains_Method_IndexedDB);
+        break;
+    case DOMStringList::Location:
+        UseCounter::count(context, UseCounter::DOMStringList_Contains_Method_Location);
+        break;
+    default:
+        ASSERT_NOT_REACHED();
+    }
+
     // FIXME: Currently, all consumers of DOMStringList store fairly small lists and thus an O(n)
     //        algorithm is OK.  But this may need to be optimized if larger amounts of data are
     //        stored in m_strings.
     size_t count = m_strings.size();
     for (size_t i = 0; i < count; ++i) {
         if (m_strings[i] == string)
             return true;
     }
     return false;
 }
 
 void DOMStringList::sort()
 {
     std::sort(m_strings.begin(), m_strings.end(), WTF::codePointCompareLessThan);
 }
 
 } // namespace blink