Cleanup: Start using toFoo methods as part of newly adopted coding guideline.

Source/core/html/HTMLInputElement.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, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
@@ skipping 1116 matching lines @@
 
 void HTMLInputElement::defaultEventHandler(Event* evt)
 {
     if (evt->isMouseEvent() && evt->type() == eventNames().clickEvent && toMouseEvent(evt)->button() == LeftButton) {
         m_inputTypeView->handleClickEvent(toMouseEvent(evt));
         if (evt->defaultHandled())
             return;
     }
 
     if (evt->isTouchEvent()) {
-        m_inputTypeView->handleTouchEvent(static_cast<TouchEvent*>(evt));
+        m_inputTypeView->handleTouchEvent(toTouchEvent(evt));
         if (evt->defaultHandled())
             return;
     }
 
     if (evt->isKeyboardEvent() && evt->type() == eventNames().keydownEvent) {
         m_inputTypeView->handleKeydownEvent(toKeyboardEvent(evt));
         if (evt->defaultHandled())
             return;
     }
 
@@ skipping 736 matching lines @@
 }
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 PassRefPtr<RenderStyle> HTMLInputElement::customStyleForRenderer()
 {
     return m_inputTypeView->customStyleForRenderer(originalStyleForRenderer());
 }
 #endif
 
 } // namespace