net: don't assume that we have an SSLHostInfo.
net: don't assume that we have an SSLHostInfo.

sync doesn't run an HttpCache and therefore sync's requests don't pickup
an SSLHostInfo.

BUG=69522
TEST=don't crash on startup

http://codereview.chromium.org/6355003/

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@71444 0039d316-1c4b-4281-b951-d872f2087c98

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