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

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

Index: third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
index e27b54f495c82e0c75f2e48d521be16364cd9e35..2e341eaaa6f1b32b82b024c46a19e4df45f26524 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp
@@ -143,7 +143,7 @@ void AXNodeObject::alterSliderValue(bool increase)
     axObjectCache().postNotification(getNode(), AXObjectCacheImpl::AXValueChanged);
 }
 
-AXObject* AXNodeObject::activeDescendant() const
+AXObject* AXNodeObject::activeDescendant()
 {
     if (!getNode() || !getNode()->isElementNode())
         return nullptr;