Move common methods to WebFormControlElement interface

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 34 matching lines @@
     WebTextAreaElement() : WebFormControlElement() { }
     WebTextAreaElement(const WebTextAreaElement& element) : WebFormControlElement(element) { }
 
     WebTextAreaElement& operator=(const WebTextAreaElement& element)
     {
         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 start, int end);
-    BLINK_EXPORT bool autoComplete() const;
-    BLINK_EXPORT WebString directionForFormData() const;
-
 #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