The previous rollout pushed the xp version of chromium git v4 to windows7. This rollout pushes the correct windows 7 version.

R=mmoss@chromium.org, szager@chromium.org
BUG=

Review URL: https://codereview.chromium.org/311713002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@274363 0039d316-1c4b-4281-b951-d872f2087c98