Revert of Expose multiline attribute from blink

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 179 matching lines @@
     AXCheckedState,
     AXEnabledState,
     AXExpandedState,
     AXFocusableState,
     AXFocusedState,
     AXHaspopupState,
     AXHoveredState,
     AXIndeterminateState,
     AXInvisibleState,
     AXLinkedState,
-    AXMultilineState,
     AXMultiselectableState,
     AXOffscreenState,
     AXPressedState,
     AXProtectedState,
     AXReadonlyState,
     AXRequiredState,
     AXSelectableState,
     AXSelectedState,
     AXVerticalState,
     AXVisitedState
@@ skipping 267 matching lines @@
     virtual AXObject* activeDescendant() const { return 0; }
     virtual String ariaAutoComplete() const { return String(); }
     virtual String ariaDescribedByAttribute() const { return String(); }
     virtual const AtomicString& ariaDropEffect() const { return nullAtom; }
     virtual void ariaFlowToElements(AccessibilityChildrenVector&) const { }
     virtual void ariaControlsElements(AccessibilityChildrenVector&) const { }
     virtual void ariaDescribedbyElements(AccessibilityChildrenVector& describedby) const { };
     virtual void ariaLabelledbyElements(AccessibilityChildrenVector& labelledby) const { };
     virtual void ariaOwnsElements(AccessibilityChildrenVector& owns) const { };
     virtual bool ariaHasPopup() const { return false; }
-    bool isMultiline() const;
+    bool ariaIsMultiline() const;
     virtual String ariaLabeledByAttribute() const { return String(); }
     bool ariaPressedIsPresent() const;
     virtual AccessibilityRole ariaRoleAttribute() const { return UnknownRole; }
     virtual bool ariaRoleHasPresentationalChildren() const { return false; }
     virtual AccessibilityOptionalBool isAriaGrabbed() const { return OptionalBoolUndefined; }
     virtual bool isPresentationalChildOfAriaRole() const { return false; }
     virtual bool shouldFocusActiveDescendant() const { return false; }
     bool supportsARIAAttributes() const;
     virtual bool supportsARIADragging() const { return false; }
     virtual bool supportsARIADropping() const { return false; }
@@ skipping 165 matching lines @@
     static bool includesARIAWidgetRole(const String&);
     static bool hasInteractiveARIAAttribute(const Element&);
 };
 
 #define DEFINE_AX_OBJECT_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, AXObject, object, object->predicate, object.predicate)
 
 } // namespace blink
 
 #endif // AXObject_h