Expose multiline attribute from blink

Source/modules/accessibility/AXObject.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 500 matching lines @@
     if (equalIgnoringCase(result, "mixed")) {
         AccessibilityRole role = ariaRoleAttribute();
         if (role == RadioButtonRole || role == MenuItemRadioRole || role == SwitchRole)
             return ButtonStateOff;
         return ButtonStateMixed;
     }
 
     return ButtonStateOff;
 }
 
-bool AXObject::ariaIsMultiline() const
+bool AXObject::isMultiline() const

[dmazzoni, 2015/03/30 06:17:54]

Let's do two more things while you're at it so that this is totally accurate

* If it's contenteditable (node->hasEditableStyle()), it should return true by
default 
* If it's not an editable text node at all (if isNativeTextControl() and
isNonNativeTextControl() both return false), it should always return false -
i.e. we shouldn't allow aria-multiline on a button or a div with no role

[shreeramk, 2015/03/30 06:36:28]

You mean to say this??
if (isNativeTextControl() && isNonNativeTextControl())
        return false;

Because the implementation of both are like if one is true other would be false
and vice-versa.

 {
+    Node* node = this->node();
+    if (!node)
+        return false;
+
+    if (isHTMLTextAreaElement(*node))
+        return true;
+
     return equalIgnoringCase(getAttribute(aria_multilineAttr), "true");
 }
 
 bool AXObject::ariaPressedIsPresent() const
 {
     return !getAttribute(aria_pressedAttr).isEmpty();
 }
 
 bool AXObject::supportsARIAAttributes() const
 {
@@ skipping 588 matching lines @@
 }
 
 const AtomicString& AXObject::roleName(AccessibilityRole role)
 {
     static const Vector<AtomicString>* roleNameVector = createRoleNameVector();
 
     return roleNameVector->at(role);
 }
 
 } // namespace blink