GitLab

ClonedInstallDetector now takes in a base::SingleThreadTaskRunner rather than
directly using content::BrowserThread::File. MachineIdProvider asserts that the
task runner on which it's operating has IO allowed rather than checking that
it's on the FILE thread.

BUG=374213
TBR=jochen

Review URL: https://codereview.chromium.org/292723004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271637 0039d316-1c4b-4281-b951-d872f2087c98