Stylistic changes for RangeMap (#24).  r=bryner

http://groups.google.com/group/airbag-dev/browse_thread/thread/97c378bd175ab7c0


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@25 4c0a9323-5329-0410-9bdc-e9ce6186880e