Fix Clang warning about tautological compare.
Fix Clang warning about tautological compare.

BUG=151927

R=hans@chromium.org

Patch from Hans Wennborg <hans@chromium.org>.

Review URL: https://chromiumcodereview.appspot.com/10985043

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@12621 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh