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Switch some uses of RangeError.range to RangeError.index. Fix bug in Queue where elementAt allowed `length` as input. R=sgjesse@google.com Review URL: https://codereview.chromium.org//711003002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@41653 260f80e4-7a28-3924-810f-c04153c831b5