Add text field change handling for autofill preview in textarea element.

Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 43 matching lines @@
 class DateTimeChooser;
 class DateTimeChooserClient;
 class Element;
 class FileChooser;
 class FloatRect;
 class Frame;
 class GraphicsContext3D;
 class GraphicsLayer;
 class GraphicsLayerFactory;
 class HitTestResult;
+class HTMLFormControlElement;
 class HTMLInputElement;
 class IntRect;
 class Node;
 class Page;
 class PagePopup;
 class PagePopupClient;
 class PagePopupDriver;
 class PopupContainer;
 class PopupMenuClient;
 class SecurityOrigin;
@@ skipping 168 matching lines @@
     virtual bool isSVGImageChromeClient() const { return false; }
 
     virtual bool requestPointerLock() { return false; }
     virtual void requestPointerUnlock() { }
 
     virtual FloatSize minimumWindowSize() const { return FloatSize(100, 100); };
 
     virtual bool isChromeClientImpl() const { return false; }
 
     virtual void didAssociateFormControls(const Vector<RefPtr<Element> >&) { };
-    virtual void didChangeValueInTextField(HTMLInputElement&) { }
+    virtual void didChangeValueInTextField(HTMLFormControlElement&) { }
     virtual void didEndEditingOnTextField(HTMLInputElement&) { }
     virtual void handleKeyboardEventOnTextField(HTMLInputElement&, KeyboardEvent&) { }
 
     // FIXME: Remove this method once we have input routing in the browser
     // process. See http://crbug.com/339659.
     virtual void forwardInputEvent(WebCore::Document*, WebCore::Event*) { }
 
     // Input mehtod editor related functions.
     virtual void didCancelCompositionOnSelectionChange() { }
     virtual void willSetInputMethodState() { }
 
     // Notifies the client of a new popup widget.  The client should place
     // and size the widget with the given bounds, relative to the screen.
     // If handleExternal is true, then drawing and input handling for the
     // popup will be handled by the external embedder.
     virtual void popupOpened(PopupContainer* popupContainer, const IntRect& bounds,
                              bool handleExternal) = 0;
 
     // Notifies the client a popup was closed.
     virtual void popupClosed(PopupContainer* popupContainer) = 0;
 
 protected:
     virtual ~ChromeClient() { }
 };
 
 }
 #endif // ChromeClient_h