Oilpan: have DOMException be on the heap by default.

Source/core/dom/DOMException.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:
  *
  * 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 80 matching lines @@
 
 DOMException::DOMException(unsigned short code, const String& name, const String& sanitizedMessage, const String& unsanitizedMessage)
 {
     ASSERT(name);
     m_code = code;
     m_name = name;
     m_sanitizedMessage = sanitizedMessage;
     m_unsanitizedMessage = unsanitizedMessage;
 }
 
-PassRefPtrWillBeRawPtr<DOMException> DOMException::create(ExceptionCode ec, const String& sanitizedMessage, const String& unsanitizedMessage)
+DOMException* DOMException::create(ExceptionCode ec, const String& sanitizedMessage, const String& unsanitizedMessage)
 {
     const CoreException* entry = getErrorEntry(ec);
     ASSERT(entry);
-    return adoptRefWillBeNoop(new DOMException(entry->code,
+    return new DOMException(entry->code,
         entry->name ? entry->name : "Error",
         sanitizedMessage.isNull() ? String(entry->message) : sanitizedMessage,
-        unsanitizedMessage));
+        unsanitizedMessage);
 }
 
 String DOMException::toString() const
 {
     return name() + ": " + message();
 }
 
 String DOMException::toStringForConsole() const
 {
     return name() + ": " + messageForConsole();
@@ skipping 13 matching lines @@
 {
     const CoreException* entry = getErrorEntry(ec);
     ASSERT(entry);
     if (!entry)
         return "Unknown error.";
 
     return entry->message;
 }
 
 } // namespace blink