Split Dictionary's get and convert into DictionaryHelper.

Source/core/dom/MutationObserver.cpp

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 68 matching lines @@
 void MutationObserver::observe(Node* node, const Dictionary& optionsDictionary, ExceptionState& exceptionState)
 {
     if (!node) {
         exceptionState.throwDOMException(NotFoundError, "The provided node was null.");
         return;
     }
 
     MutationObserverOptions options = 0;
 
     bool attributeOldValue = false;
-    bool attributeOldValuePresent = optionsDictionary.get("attributeOldValue", attributeOldValue);
+    bool attributeOldValuePresent = DictionaryHelper::get(optionsDictionary, "attributeOldValue", attributeOldValue);
     if (attributeOldValue)
         options |= AttributeOldValue;
 
     HashSet<AtomicString> attributeFilter;
-    bool attributeFilterPresent = optionsDictionary.get("attributeFilter", attributeFilter);
+    bool attributeFilterPresent = DictionaryHelper::get(optionsDictionary, "attributeFilter", attributeFilter);
     if (attributeFilterPresent)
         options |= AttributeFilter;
 
     bool attributes = false;
-    bool attributesPresent = optionsDictionary.get("attributes", attributes);
+    bool attributesPresent = DictionaryHelper::get(optionsDictionary, "attributes", attributes);
     if (attributes || (!attributesPresent && (attributeOldValuePresent || attributeFilterPresent)))
         options |= Attributes;
 
     bool characterDataOldValue = false;
-    bool characterDataOldValuePresent = optionsDictionary.get("characterDataOldValue", characterDataOldValue);
+    bool characterDataOldValuePresent = DictionaryHelper::get(optionsDictionary, "characterDataOldValue", characterDataOldValue);
     if (characterDataOldValue)
         options |= CharacterDataOldValue;
 
     bool characterData = false;
-    bool characterDataPresent = optionsDictionary.get("characterData", characterData);
+    bool characterDataPresent = DictionaryHelper::get(optionsDictionary, "characterData", characterData);
     if (characterData || (!characterDataPresent && characterDataOldValuePresent))
         options |= CharacterData;
 
     bool childListValue = false;
-    if (optionsDictionary.get("childList", childListValue) && childListValue)
+    if (DictionaryHelper::get(optionsDictionary, "childList", childListValue) && childListValue)
         options |= ChildList;
 
     bool subtreeValue = false;
-    if (optionsDictionary.get("subtree", subtreeValue) && subtreeValue)
+    if (DictionaryHelper::get(optionsDictionary, "subtree", subtreeValue) && subtreeValue)
         options |= Subtree;
 
     if (!(options & Attributes)) {
         if (options & AttributeOldValue) {
             exceptionState.throwTypeError("The options object may only set 'attributeOldValue' to true when 'attributes' is true or not present.");
             return;
         }
         if (options & AttributeFilter) {
             exceptionState.throwTypeError("The options object may only set 'attributeFilter' when 'attributes' is true or not present.");
             return;
@@ skipping 145 matching lines @@
     }
 }
 
 void MutationObserver::trace(Visitor* visitor)
 {
     visitor->trace(m_records);
     visitor->trace(m_registrations);
 }
 
 } // namespace WebCore