move mContainer and mInner to be non-static members, and release them with the xpcom shutdown observer, to prevent leaks git-svn-id: svn://10.0.0.236/trunk@123812 18797224-902f-48f8-a5cc-f745e15eee43
move mContainer and mInner to be non-static members, and release them with the xpcom shutdown observer, to prevent leaks git-svn-id: svn://10.0.0.236/trunk@123812 18797224-902f-48f8-a5cc-f745e15eee43