Remove hacks added to workaround a system salt issue for M31
In crrev.com/228189, we had to add horrible hacks to workaround an urgent
P1 issue, which needed to be merged to M31 branch immediately.
The hacks are no longer necesssary, as the system salt is obtained
before DeviceOAuth2TokenService is created. See crbug.com/309959
for details.
BUG=306547
TEST=see the bug comment #9
R=hashimoto@chromium.org
Review URL: https://codereview.chromium.org/
43203002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230969 0039d316-1c4b-4281-b951-d872f2087c98