Reland of Uses the activedescendant_changed event received from Blink to fire the right focus event

third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp b/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
index 70be3a8afbd316cf6e741eaf233ec880c4de72b8..cac5dfc40aca55a0cacf3ad9c1077d9e700bb9ae 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXMenuListPopup.cpp
@@ -147,7 +147,7 @@
 
     if (optionIndex >= 0 && optionIndex < static_cast<int>(m_children.size())) {
         AXObject* child = m_children[optionIndex].get();
-        cache.postNotification(child, AXObjectCacheImpl::AXFocusedUIElementChanged);
+        cache.postNotification(this, AXObjectCacheImpl::AXActiveDescendantChanged);
         cache.postNotification(child, AXObjectCacheImpl::AXMenuListItemSelected);
     }
 
@@ -158,8 +158,8 @@
 {
     AXObjectCacheImpl& cache = axObjectCache();
     cache.postNotification(this, AXObjectCacheImpl::AXHide);
-    if (activeChild())
-        cache.postNotification(activeChild(), AXObjectCacheImpl::AXMenuListItemUnselected);
+    if (activeDescendant())
+        cache.postNotification(activeDescendant(), AXObjectCacheImpl::AXMenuListItemUnselected);
 }
 
 void AXMenuListPopup::didShow()
@@ -176,7 +176,7 @@
         cache.postNotification(m_parent, AXObjectCacheImpl::AXFocusedUIElementChanged);
 }
 
-AXObject* AXMenuListPopup::activeChild()
+AXObject* AXMenuListPopup::activeDescendant()
 {
     if (m_activeIndex < 0 || m_activeIndex >= static_cast<int>(children().size()))
         return nullptr;