- move nsCOMArray_base's ObjectAt/[]/Count() methods into the public so that nsCOMArrayEnumerator can get to it
- tweak NS_NewArray() to match the existing enumerator NS_New* API
- hook up NS_NewArrayEnumerator to nsArray::Enumerate
Not part of the build, for bug 162115
git-svn-id: svn://10.0.0.236/trunk@130891 18797224-902f-48f8-a5cc-f745e15eee43