base: Get rid of the deprecated SysInfo::HasEnvVar.

Use the new EnvVarGetter::HasEnv instead.

BUG=None
TEST=trybots

Review URL: http://codereview.chromium.org/2819042

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51648 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 705800aed2989c63913a76750d28c25932aa6f46
3 files changed
tree: c5b1ad079e604128455547a109fa81ff13a258cf
  1. base/
  2. build/
  3. ipc/
  4. testing/