Adds AX role for abbr tag.

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 117 matching lines @@
     { "treeitem", TreeItemRole }
 };
 
 struct InternalRoleEntry {
     AccessibilityRole webcoreRole;
     const char* internalRoleName;
 };
 
 const InternalRoleEntry internalRoles[] = {
     { UnknownRole, "Unknown" },
+    { AbbrRole, "Abbr" },
     { AlertDialogRole, "AlertDialog" },
     { AlertRole, "Alert" },
     { AnnotationRole, "Annotation" },
     { ApplicationRole, "Application" },
     { ArticleRole, "Article" },
     { BannerRole, "Banner" },
     { BlockquoteRole, "Blockquote" },
     // TODO(nektar): Delete busy_indicator role. It's used nowhere.
     { BusyIndicatorRole, "BusyIndicator" },
     { ButtonRole, "Button" },
@@ skipping 1554 matching lines @@
 
 DEFINE_TRACE(AXObject)
 {
     visitor->trace(m_children);
     visitor->trace(m_parent);
     visitor->trace(m_cachedLiveRegionRoot);
     visitor->trace(m_axObjectCache);
 }
 
 } // namespace blink