Apply OwnPtr|PassOwnPtr to m_validationMessageClient and setValidationMessageClient() in Page class

Source/core/html/forms/ValidationMessage.cpp

 /*
  * Copyright (C) 2010, 2012 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 42 matching lines @@
 PassOwnPtr<ValidationMessage> ValidationMessage::create(HTMLFormControlElement* element)
 {
     return adoptPtr(new ValidationMessage(element));
 }
 
 ValidationMessageClient* ValidationMessage::validationMessageClient() const
 {
     Page* page = m_element->document().page();
     if (!page)
         return 0;
-    // The form valdiation feature requires ValidationMessageClient.
-    ASSERT(page->validationMessageClient());
-    return page->validationMessageClient();
+
+    return &page->validationMessageClient();
 }
 
 void ValidationMessage::updateValidationMessage(const String& message)
 {
     ValidationMessageClient* client = validationMessageClient();
     if (!client)
         return;
     if (message.isEmpty())
         requestToHideMessage();
     else
         client->showValidationMessage(*m_element, message);
 }
 
 void ValidationMessage::requestToHideMessage()
 {
     if (ValidationMessageClient* client = validationMessageClient())
         client->hideValidationMessage(*m_element);
 }
 
 bool ValidationMessage::isVisible() const
 {
     if (ValidationMessageClient* client = validationMessageClient())
         return client->isValidationMessageVisible(*m_element);
     return false;
 }
 
 } // namespace WebCore