GitLab

These added fields are necessary to work with our file system
implementation.

BUG=chromium:127728
TEST=unit_tests --gtest_filter="DriveAPI*"

Review URL: https://chromiumcodereview.appspot.com/10855017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150291 0039d316-1c4b-4281-b951-d872f2087c98