e.stderr may be None
e.stderr may be None

Review URL: http://codereview.chromium.org/1272003

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@42505 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

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