The end goal is to remove options.stdout, to remove a lot of bookkeeping.

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/3418014

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@59792 0039d316-1c4b-4281-b951-d872f2087c98