GitLab

ShutdownAndBlock function can be called multiple times safely.
So checking |shutdown_completed_| in OnDisonnected function is not necessary.

BUG=174431
TEST=Checked no crash at sing out.


Review URL: https://chromiumcodereview.appspot.com/12212133

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182161 0039d316-1c4b-4281-b951-d872f2087c98