Treat .txt files as 'source' files (to enforce LF and line length)
Treat .txt files as 'source' files (to enforce LF and line length)

Review URL: http://codereview.chromium.org/174210


git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@24100 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

svn2github/chromium-depot-tools,svn2github/chromium-depot-tools,svn2github/chromium-depot-tools