Improve SVN.Revert() again to work better in reverting svn added directories.

Revert the order back to deleting then svn revert'ing, which is safer than the
reverse. Document a bit better the behavior.

[email protected]
BUG=none
TEST=commit queue should die less often


Review URL: http://codereview.chromium.org/6681032

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@78224 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed