More precise use of multiline state

third_party/WebKit/Source/modules/accessibility/AXObject.h

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 622 matching lines @@
   virtual String StringValue() const { return String(); }
 
   // ARIA attributes.
   virtual AXObject* ActiveDescendant() { return nullptr; }
   virtual String AriaAutoComplete() const { return String(); }
   virtual void AriaOwnsElements(AXObjectVector& owns) const {}
   virtual void AriaDescribedbyElements(AXObjectVector&) const {}
   virtual void AriaLabelledbyElements(AXObjectVector&) const {}
   virtual bool AriaHasPopup() const { return false; }
   virtual bool IsEditable() const { return false; }
-  bool IsMultiline() const;
+  virtual bool IsMultiline() const { return false; }
   virtual bool IsRichlyEditable() const { return false; }
   bool AriaCheckedIsPresent() const;
   bool AriaPressedIsPresent() const;
   virtual AccessibilityRole AriaRoleAttribute() const { return kUnknownRole; }
   virtual bool AriaRoleHasPresentationalChildren() const { return false; }
   virtual AXObject* AncestorForWhichThisIsAPresentationalChild() const {
     return 0;
   }
   bool SupportsActiveDescendant() const;
   bool SupportsARIAAttributes() const;
@@ skipping 240 matching lines @@
   static unsigned number_of_live_ax_objects_;
 };
 
 #define DEFINE_AX_OBJECT_TYPE_CASTS(thisType, predicate)           \
   DEFINE_TYPE_CASTS(thisType, AXObject, object, object->predicate, \
                     object.predicate)
 
 }  // namespace blink
 
 #endif  // AXObject_h