Show reasons why nodes are ignored in accessibility sidebar

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 295 matching lines @@
 };
 
 enum AXIgnoredReason {
     AXActiveModalDialog,
     AXAncestorDisallowsChild,
     AXAncestorIsLeafNode,
     AXAriaHidden,
     AXAriaHiddenRoot,
     AXEmptyAlt,
     AXEmptyText,
+    AXInert,
     AXInheritsPresentation,
     AXLabelContainer,
     AXLabelFor,
     AXNotRendered,
     AXNotVisible,
+    AXPresentationRole,

[dmazzoni, 2015/04/30 15:06:40]

How about PresentationalRole since it could be either role=presentation or
role=none?

     AXProbablyPresentational,
     AXStaticTextUsedAsNameFor,
     AXUninteresting
 };
 
 struct IgnoredReason {
     AXIgnoredReason reason;
     const AXObject* relatedObject;
 
     explicit IgnoredReason(AXIgnoredReason reason)
@@ skipping 429 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