GitLab

Basically three new file block types appear: One for normal
entries, one for deleted entries and one for keeping track
of external files.

BUG=241277
TEST=net_unittests
R=gavinp@chromium.org

Review URL: https://codereview.chromium.org/16837003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207870 0039d316-1c4b-4281-b951-d872f2087c98