Allow form submission for forms with "hidden" for submit with enter key

Source/core/html/HTMLFormElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 184 matching lines @@
     const Vector<FormAssociatedElement*>& elements = associatedElements();
     for (unsigned i = 0; i < elements.size(); ++i) {
         FormAssociatedElement* formAssociatedElement = elements[i];
         if (!formAssociatedElement->isFormControlElement())
             continue;
         HTMLFormControlElement* control = toHTMLFormControlElement(formAssociatedElement);
         if (!seenDefaultButton && control->canBeSuccessfulSubmitButton()) {
             if (fromImplicitSubmissionTrigger)
                 seenDefaultButton = true;
             if (control->isSuccessfulSubmitButton()) {
-                if (control->renderer()) {
-                    control->dispatchSimulatedClick(event);
-                    return;
-                }
+                control->dispatchSimulatedClick(event);
+                return;
             } else if (fromImplicitSubmissionTrigger) {
                 // Default (submit) button is not activated; no implicit submission.
                 return;
             }
         } else if (control->canTriggerImplicitSubmission()) {
             ++submissionTriggerCount;
         }
     }
     if (fromImplicitSubmissionTrigger && submissionTriggerCount == 1)
         prepareForSubmission(event);
@@ skipping 598 matching lines @@
 }
 
 void HTMLFormElement::setDemoted(bool demoted)
 {
     if (demoted)
         UseCounter::count(document(), UseCounter::DemotedFormElement);
     m_wasDemoted = demoted;
 }
 
 } // namespace