HTMLOptionElement code style: consistently access select owner.

Source/core/html/HTMLOptionElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Motorola Mobility, Inc.  All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 128 matching lines @@
         removeChildren();
         appendChild(Text::create(document(), text), exceptionState);
     }
 
     if (selectIsMenuList && select->selectedIndex() != oldSelectedIndex)
         select->setSelectedIndex(oldSelectedIndex);
 }
 
 void HTMLOptionElement::accessKeyAction(bool)
 {
-    HTMLSelectElement* select = ownerSelectElement();
-    if (select)
+    if (HTMLSelectElement* select = ownerSelectElement())
         select->accessKeySetSelectedIndex(index());
 }
 
 int HTMLOptionElement::index() const
 {
     // It would be faster to cache the index, but harder to get it right in all cases.
 
     HTMLSelectElement* selectElement = ownerSelectElement();
     if (!selectElement)
         return 0;
@@ skipping 200 matching lines @@
         if (node->isElementNode() && toScriptLoaderIfPossible(toElement(node)))
             node = NodeTraversal::nextSkippingChildren(*node, this);
         else
             node = NodeTraversal::next(*node, this);
     }
     return text.toString();
 }
 
 HTMLFormElement* HTMLOptionElement::form() const
 {
-    HTMLSelectElement* selectElement = ownerSelectElement();
-    if (!selectElement)
-        return 0;
+    if (HTMLSelectElement* selectElement = ownerSelectElement())
+        return selectElement->formOwner();
 
-    return selectElement->formOwner();
+    return 0;
 }
 
 } // namespace WebCore