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

public/web/WebTextAreaElement.h

 /*
  * Copyright (C) 2013 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 38 matching lines @@
     {
         WebFormControlElement::assign(element);
         return *this;
     }
     void assign(const WebTextAreaElement& element) { WebFormControlElement::assign(element); }
 
     BLINK_EXPORT void setValue(const WebString&);
     BLINK_EXPORT WebString value() const;
     BLINK_EXPORT void setSuggestedValue(const WebString&);
     BLINK_EXPORT WebString suggestedValue() const;
+    BLINK_EXPORT void setSelectionRange(int, int);

[abarth-chromium, 2014/02/05 19:08:13]

Can you give these parameters some names?  It's not clear from "int" what they
mean.  Maybe the first one is the start and the second one is the end?  Maybe
the second one is the length?

[ziran.sun, 2014/02/06 10:32:17]

Done.

 
 #if BLINK_IMPLEMENTATION
     WebTextAreaElement(const WTF::PassRefPtr<WebCore::HTMLTextAreaElement>&);
     WebTextAreaElement& operator=(const WTF::PassRefPtr<WebCore::HTMLTextAreaElement>&);
     operator WTF::PassRefPtr<WebCore::HTMLTextAreaElement>() const;
 #endif
 };
 
 } // namespace blink
 
 #endif