Replace elementHasLegalLinkAttribute() helper with virtual function

Source/core/html/forms/InputType.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. 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
@@ skipping 173 matching lines @@
     virtual bool shouldRespectSpeechAttribute();
     virtual bool isEnumeratable();
     virtual bool isCheckable();
     virtual bool isSteppable() const;
     virtual bool shouldRespectHeightAndWidthAttributes();
     virtual bool supportsPlaceholder() const;
     virtual bool supportsReadOnly() const;
     virtual String defaultToolTip() const;
     virtual Decimal findClosestTickMarkValue(const Decimal&);
     virtual void handleDOMActivateEvent(Event*);
+    virtual bool hasLegalLinkAttribute(const QualifiedName&) const;
 
     // Parses the specified string for the type, and return
     // the Decimal value for the parsing result if the parsing
     // succeeds; Returns defaultValue otherwise. This function can
     // return NaN or Infinity only if defaultValue is NaN or Infinity.
     virtual Decimal parseToNumber(const String&, const Decimal& defaultValue) const;
 
     // Create a string representation of the specified Decimal value for the
     // input type. If NaN or Infinity is specified, this returns an empty
     // string. This should not be called for types without valueAsNumber.
@@ skipping 28 matching lines @@
 
     StepRange createStepRange(AnyStepHandling, const Decimal& stepBaseDefault, const Decimal& minimumDefault, const Decimal& maximumDefault, const StepRange::StepDescription&) const;
 
 private:
     // Helper for stepUp()/stepDown(). Adds step value * count to the current value.
     void applyStep(const Decimal&, int count, AnyStepHandling, TextFieldEventBehavior, ExceptionState&);
 };
 
 } // namespace WebCore
 #endif