Add Autofill preview support for <select> input fields

Source/web/WebSelectElement.cpp

 /*
  * Copyright (C) 2010 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 33 matching lines @@
 void WebSelectElement::setValue(const WebString& value)
 {
     unwrap<HTMLSelectElement>()->setValue(value);
 }
 
 WebString WebSelectElement::value() const
 {
     return constUnwrap<HTMLSelectElement>()->value();
 }
 
+void WebSelectElement::setSuggestedValue(const WebString& value)
+{
+    unwrap<HTMLSelectElement>()->setSuggestedValue(value);
+}
+
+WebString WebSelectElement::suggestedValue() const
+{
+    return constUnwrap<HTMLSelectElement>()->suggestedValue();
+}
+
 WebVector<WebElement> WebSelectElement::listItems() const
 {
     const Vector<HTMLElement*>& sourceItems = constUnwrap<HTMLSelectElement>()->listItems();
     WebVector<WebElement> items(sourceItems.size());
     for (size_t i = 0; i < sourceItems.size(); ++i)
         items[i] = WebElement(sourceItems[i]);
 
     return items;
 }
 
 WebSelectElement::WebSelectElement(const PassRefPtr<HTMLSelectElement>& element)
     : WebFormControlElement(element)
 {
 }
 
 WebSelectElement& WebSelectElement::operator=(const PassRefPtr<HTMLSelectElement>& element)
 {
     m_private = element;
     return *this;
 }
 
 WebSelectElement::operator PassRefPtr<HTMLSelectElement>() const
 {
     return toHTMLSelectElement(m_private.get());
 }
 
 } // namespace blink