Add a use counter and deprecation message for showModalDialog

Source/core/frame/DOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 1820 matching lines @@
     Frame* activeFrame = activeWindow->frame();
     if (!activeFrame)
         return;
     Frame* firstFrame = firstWindow->frame();
     if (!firstFrame)
         return;
 
     if (!canShowModalDialogNow(m_frame) || !firstWindow->allowPopUp())
         return;
 
+    UseCounter::countDeprecation(this, UseCounter::ShowModalDialog);
+
     WindowFeatures windowFeatures(dialogFeaturesString, screenAvailableRect(m_frame->view()));
     Frame* dialogFrame = createWindow(urlString, emptyAtom, windowFeatures,
         activeWindow, firstFrame, m_frame, function, functionContext);
     if (!dialogFrame)
         return;
     UserGestureIndicatorDisabler disabler;
     dialogFrame->page()->chrome().runModal();
 }
 
 DOMWindow* DOMWindow::anonymousIndexedGetter(uint32_t index)
@@ skipping 14 matching lines @@
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<DOMWindow> > DOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 
 } // namespace WebCore