Fixing bug 413200. Make sure script termination functions run when XPConnect is done executing script on a context and there's no other script running on that context. r+sr=mrbkap@gmail.com

dom/src/base/nsJSEnvironment.cpp

@@ -3316,7 +3316,7 @@ nsJSContext::SetGCOnDestruction(PRBool aGCOnDestruction)
 NS_IMETHODIMP
 nsJSContext::ScriptExecuted()
 {
-  ScriptEvaluated(PR_FALSE);
+  ScriptEvaluated(!::JS_IsRunning(mContext));
 
   return NS_OK;
 }