This conforms to the convention of using a single-line short description
followed by an empty line followed by a long description. Shortened the
revisions to more easily fit on one line.

BUG=408700

Review URL: https://codereview.chromium.org/513383002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@291743 0039d316-1c4b-4281-b951-d872f2087c98