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It's not used for a real purpose anymore, and it was causing the SCM to have
multiple active_connection_ objects in certain cases, which is bad.

This is mostly covered by SyncAPIServerConnectionManagerTest

BUG=101639
TEST=On a debug build, no DCHECKs if the server is unreachable on sync startup.


Review URL: http://codereview.chromium.org/8590005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110443 0039d316-1c4b-4281-b951-d872f2087c98