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

Source/web/WebInputElement.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 94 matching lines @@
 void WebInputElement::setValue(const WebString& value, bool sendChangeEvent)
 {
     unwrap<HTMLInputElement>()->setValue(value, sendChangeEvent ? DispatchChangeEvent : DispatchNoEvent);
 }
 
 WebString WebInputElement::value() const
 {
     return constUnwrap<HTMLInputElement>()->value();
 }
 
-WebString WebInputElement::editingValue() const
-{
-    return constUnwrap<HTMLInputElement>()->innerTextValue();
-}
-
 void WebInputElement::setEditingValue(const WebString& value)
 {
     unwrap<HTMLInputElement>()->setEditingValue(value);
 }
 
 void WebInputElement::setSuggestedValue(const WebString& value)
 {
     unwrap<HTMLInputElement>()->setSuggestedValue(value);
 }
 
 WebString WebInputElement::suggestedValue() const
 {
     return constUnwrap<HTMLInputElement>()->suggestedValue();
 }
 
 void WebInputElement::setSelectionRange(int start, int end)
 {
     unwrap<HTMLInputElement>()->setSelectionRange(start, end);
 }
 
-int WebInputElement::selectionStart() const
-{
-    return constUnwrap<HTMLInputElement>()->selectionStart();
-}
-
-int WebInputElement::selectionEnd() const
-{
-    return constUnwrap<HTMLInputElement>()->selectionEnd();
-}
-
 bool WebInputElement::isValidValue(const WebString& value) const
 {
     return constUnwrap<HTMLInputElement>()->isValidValue(value);
 }
 
 void WebInputElement::setChecked(bool nowChecked, bool sendChangeEvent)
 {
     unwrap<HTMLInputElement>()->setChecked(nowChecked, sendChangeEvent ? DispatchChangeEvent : DispatchNoEvent);
 }
 
@@ skipping 104 matching lines @@
 }
 
 WebInputElement* toWebInputElement(WebElement* webElement)
 {
     if (!webElement->unwrap<Element>()->hasTagName(HTMLNames::inputTag))
         return 0;
 
     return static_cast<WebInputElement*>(webElement);
 }
 } // namespace blink