Aria disabled does not apply to descendant elements

Source/modules/accessibility/AXNodeObject.cpp

Index: Source/modules/accessibility/AXNodeObject.cpp
diff --git a/Source/modules/accessibility/AXNodeObject.cpp b/Source/modules/accessibility/AXNodeObject.cpp
index a1f56766d0d975ee78bac70cf5d0f66a1d0dbfa4..ef4467662a54c5653c774fd856b647175cde7b0c 100644
--- a/Source/modules/accessibility/AXNodeObject.cpp
+++ b/Source/modules/accessibility/AXNodeObject.cpp
@@ -727,8 +727,11 @@ bool AXNodeObject::isClickable() const
 
 bool AXNodeObject::isEnabled() const
 {
-    if (equalIgnoringCase(getAttribute(aria_disabledAttr), "true"))
-        return false;
+    for (AXObject* axObject = const_cast<AXNodeObject*>(this); axObject; axObject = axObject->parentObject()) {

[dmazzoni, 2015/03/16 15:45:03]

I'm trying to avoid code that iterates over all ancestors. Please make this a
cached attribute like  m_cachedIsInertOrAriaHidden and
m_cachedIsDescendantOfBarrenParent.

+        const AtomicString& disabled = axObject->getAttribute(aria_disabledAttr);
+        if (equalIgnoringCase(disabled, "true"))
+            return false;
+    }
 
     Node* node = this->node();
     if (!node || !node->isElementNode())