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

Use the new EnvVarGetter::GetEnv instead.

BUG=None
TEST=trybots

Review URL: http://codereview.chromium.org/2876045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51829 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 6c817557ed5fa92658cfc0616fe72a71643491f9
3 files changed
tree: b7beb7c00c771836f955fdeb509256a933009b0f
  1. base/
  2. build/
  3. ipc/
  4. testing/