Bug 594760, no need to initialize when nsCOMPtr is used, r=roc, a=roc

--HG--
extra : rebase_source : b04e017e6dd9cbffb125911069354fc7015b4e60

content/events/src/nsEventStateManager.cpp

@@ -2830,7 +2830,7 @@ nsEventStateManager::PostHandleEvent(nsPresContext* aPresContext,
 
       if (nsEventStatus_eConsumeNoDefault != *aStatus) {
         nsCOMPtr<nsIContent> newFocus;
-        nsIContent* activeContent = nsnull;
+        nsCOMPtr<nsIContent> activeContent;
         PRBool suppressBlur = PR_FALSE;
         if (mCurrentTarget) {
           mCurrentTarget->GetContentForEvent(mPresContext, aEvent, getter_AddRefs(newFocus));