Make LS_ logging constants to match Chromium's logging constants when building with Chrome. This was causing logging to be done at incorrect levels and filters not work as expected. R=perkj@webrtc.org Review URL: https://webrtc-codereview.appspot.com/40239004 Cr-Commit-Position: refs/heads/master@{#8635} git-svn-id: http://webrtc.googlecode.com/svn/trunk@8635 4adac7df-926f-26a2-2b94-8c16560cd09d