Aria disabled does not apply to descendant elements

Source/modules/accessibility/AXObject.h

Index: Source/modules/accessibility/AXObject.h
diff --git a/Source/modules/accessibility/AXObject.h b/Source/modules/accessibility/AXObject.h
index 21061d1669ad8966f8f99bc2931fa6c7825ba2aa..4c38ea6190a868787d4793ddef27f1b83278af9f 100644
--- a/Source/modules/accessibility/AXObject.h
+++ b/Source/modules/accessibility/AXObject.h
@@ -429,6 +429,8 @@ public:
     bool computeIsInertOrAriaHidden() const;
     bool isDescendantOfBarrenParent() const;
     bool computeIsDescendantOfBarrenParent() const;
+    bool isDescendantOfDisabledParent() const;

[dmazzoni, 2015/03/27 19:21:17]

One small nitpick, sorry - let's call it isDescendantOfDisabledNode or
isInDisabledSubtree.

The current name - isDescendantOfDisabledParent - implies that it's checking if
the *parent* is disabled but not necessarily if the node itself is disabled -
but it's actually checking the node itself.

This is different than isDescendantOfBarrenParent, which checks if the *parent*
(or higher ancestor) can have children or not, but doesn't check that on the
current node.

+    bool computeIsDescendantOfDisabledParent() const;
     bool lastKnownIsIgnoredValue();
     void setLastKnownIsIgnoredValue(bool);
 
@@ -649,6 +651,7 @@ protected:
     mutable bool m_cachedIsIgnored : 1;
     mutable bool m_cachedIsInertOrAriaHidden : 1;
     mutable bool m_cachedIsDescendantOfBarrenParent : 1;
+    mutable bool m_cachedIsDescendantOfDisabledParent : 1;
     mutable const AXObject* m_cachedLiveRegionRoot;
 
     AXObjectCacheImpl* m_axObjectCache;