Add Dictionary get() method for AtomicString values and use it

Source/bindings/v8/Dictionary.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
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 181 matching lines @@
     ConversionContextScope scope(context);
 
     bool hasValue = false;
     if (!get(key, value, hasValue) && hasValue) {
         context.throwTypeError(ExceptionMessages::incorrectPropertyType(key, "is not of type 'double'."));
         return false;
     }
     return true;
 }
 
-bool Dictionary::get(const String& key, String& value) const
+template<typename StringType>
+inline bool Dictionary::getStringType(const String& key, StringType& value) const
 {
     v8::Local<v8::Value> v8Value;
     if (!getKey(key, v8Value))
         return false;
 
     V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(V8StringResource<>, stringValue, v8Value, false);
     value = stringValue;
     return true;
 }
 
+bool Dictionary::get(const String& key, String& value) const
+{
+    return getStringType(key, value);
+}
+
+bool Dictionary::get(const String& key, AtomicString& value) const
+{
+    return getStringType(key, value);
+}
+
 bool Dictionary::convert(ConversionContext& context, const String& key, String& value) const
 {
     ConversionContextScope scope(context);
 
     v8::Local<v8::Value> v8Value;
     if (!getKey(key, v8Value))
         return true;
 
     V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(V8StringResource<>, stringValue, v8Value, false);
     value = stringValue;
@@ skipping 537 matching lines @@
 {
     if (forConstructor()) {
         exceptionState().throwTypeError(detail);
     } else {
         ASSERT(!methodName().isEmpty());
         exceptionState().throwTypeError(ExceptionMessages::failedToExecute(interfaceName(), methodName(), detail));
     }
 }
 
 } // namespace WebCore