their parent chain. Add some asserts to check that this actually does give the same result, which it should with splitwindow. Bug 289655, r=dbradley, sr=jst git-svn-id: svn://10.0.0.236/trunk@184744 18797224-902f-48f8-a5cc-f745e15eee43
their parent chain. Add some asserts to check that this actually does give the same result, which it should with splitwindow. Bug 289655, r=dbradley, sr=jst git-svn-id: svn://10.0.0.236/trunk@184744 18797224-902f-48f8-a5cc-f745e15eee43