Aria disabled does not apply to descendant elements

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 411 matching lines @@
     // Whether objects are ignored, i.e. not included in the tree.
     bool accessibilityIsIgnored() const;
     bool accessibilityIsIgnoredByDefault() const;
     AXObjectInclusion accessibilityPlatformIncludesObject() const;
     virtual AXObjectInclusion defaultObjectInclusion() const;
     bool isInertOrAriaHidden() const;
     const AXObject* ariaHiddenRoot() const;
     bool computeIsInertOrAriaHidden() const;
     bool isDescendantOfBarrenParent() const;
     bool computeIsDescendantOfBarrenParent() const;
+    bool isDescendantOfDisabledNode() const;
+    bool computeIsDescendantOfDisabledNode() const;
     bool lastKnownIsIgnoredValue();
     void setLastKnownIsIgnoredValue(bool);
 
     // Properties of static elements.
     virtual const AtomicString& accessKey() const { return nullAtom; }
     virtual bool canvasHasFallbackContent() const { return false; }
     virtual bool exposesTitleUIElement() const { return true; }
     virtual int headingLevel() const { return 0; }
     // 1-based, to match the aria-level spec.
     virtual unsigned hierarchicalLevel() const { return 0; }
@@ skipping 200 matching lines @@
     bool m_detached;
 
     mutable AXObject* m_parent;
 
     // The following cached attribute values (the ones starting with m_cached*)
     // are only valid if m_lastModificationCount matches AXObjectCacheImpl::modificationCount().
     mutable int m_lastModificationCount;
     mutable bool m_cachedIsIgnored : 1;
     mutable bool m_cachedIsInertOrAriaHidden : 1;
     mutable bool m_cachedIsDescendantOfBarrenParent : 1;
+    mutable bool m_cachedIsDescendantOfDisabledNode : 1;
     mutable const AXObject* m_cachedLiveRegionRoot;
 
     AXObjectCacheImpl* m_axObjectCache;
 
     // Updates the cached attribute values. This may be recursive, so to prevent deadlocks,
     // functions called here may only search up the tree (ancestors), not down.
     void updateCachedAttributeValuesIfNeeded() const;
 
 private:
     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