A few cleanups to the sync unit tests.
I didn't want to mix these in with other changes that are due
to real expectations changes.

BUG=46769 (related work)
TEST=sync_unit_tests

Review URL: http://codereview.chromium.org/2811031

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50791 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed