Fix URLRequestHttpJob to use ScopedRunnableMethodFactory.

This will prevent us from leaking SSLClientSockets on shutdown since the certificate related functions complete asynchronously.  There's no reason to keep the URLRequestHttpJob alive, since Kill() will cancel the delegates appropriately, so we use ScopedRunnableMethodFactory to avoid AddRef()'ing when we PostTask().

BUG=63692
TEST=existing

Review URL: http://codereview.chromium.org/5556004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@68153 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed