Finish all string attributes for Accessibility Object Model Phase 1.

third_party/WebKit/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 934 matching lines @@
     case LinkRole:
       return AXSupportedAction::Jump;
     case PopUpButtonRole:
       return AXSupportedAction::Open;
     default:
       return AXSupportedAction::Click;
   }
 }
 
 AccessibilityButtonState AXObject::checkboxOrRadioValue() const {
-  const AtomicString& checkedAttribute = getAttribute(aria_checkedAttr);
+  const AtomicString& checkedAttribute =
+      getAOMPropertyOrARIAAttribute(AOMStringProperty::kChecked);
   if (equalIgnoringCase(checkedAttribute, "true"))
     return ButtonStateOn;
 
   if (equalIgnoringCase(checkedAttribute, "mixed")) {
     // Only checkboxes should support the mixed state.
     AccessibilityRole role = ariaRoleAttribute();
     if (role == CheckBoxRole || role == MenuItemCheckBoxRole)
       return ButtonStateMixed;
   }
 
@@ skipping 818 matching lines @@
 }
 
 DEFINE_TRACE(AXObject) {
   visitor->trace(m_children);
   visitor->trace(m_parent);
   visitor->trace(m_cachedLiveRegionRoot);
   visitor->trace(m_axObjectCache);
 }
 
 }  // namespace blink