Bug 1407375. Make sure to call NodeInfoChanged whenever we change the nodeinfo on a node. r=peterv

MozReview-Commit-ID: 71k1jv8thFA

dom/base/nsNodeUtils.cpp

@@ -616,6 +616,9 @@ nsNodeUtils::CloneAndAdopt(nsINode *aNode, bool aClone, bool aDeep,
             aNode->OwnerDoc()->UnregisterActivityObserver(aNode->AsElement());
           }
           aNode->mNodeInfo.swap(newNodeInfo);
+          if (elem) {
+            elem->NodeInfoChanged(newDoc);
+          }
           if (wasRegistered) {
             aNode->OwnerDoc()->RegisterActivityObserver(aNode->AsElement());
           }