[sync]: add ManagedUserSigninManagerWrapper and pass to ProfileSyncService

BUG=80194

Review URL: https://codereview.chromium.org/137753012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250814 0039d316-1c4b-4281-b951-d872f2087c98
Add certificates not loaded NET_LOG_EVENT.

BUG=341324

Review URL: https://codereview.chromium.org/156783002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250815 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250815