Bug 1306127 - reorder event may be not coalesced, r=yzen

accessible/base/EventTree.cpp

@@ -258,7 +258,7 @@ EventTree*
 EventTree::FindOrInsert(Accessible* aContainer)
 {
   if (!mFirst) {
-    mFirst.reset(new EventTree(aContainer, true));
+    mFirst.reset(new EventTree(aContainer, mDependentEvents.IsEmpty()));
     return mFirst.get();
   }
 

accessible/tests/mochitest/treeupdate/test_ariaowns.html

@@ -77,7 +77,8 @@
         new invokerChecker(EVENT_SHOW, getNode("t1_subdiv")),
         new invokerChecker(EVENT_HIDE, getNode("t1_button")),
         new invokerChecker(EVENT_SHOW, getNode("t1_button")),
-        new invokerChecker(EVENT_REORDER, getNode("t1_container"))
+        new invokerChecker(EVENT_REORDER, getNode("t1_container")),
+        new unexpectedInvokerChecker(EVENT_REORDER, getNode("t1_checkbox"))
       ];
 
       this.invoke = function removeARIAOwns_invoke()