Linux: fix layout test crash for security/block-test.html.
Linux: fix layout test crash for security/block-test.html.

If a connection fails without EINPROGRESS then we don't close the socket
right away, but wait until the destructor calls Disconnect(). However,
Disconnect assumes that we managed to setup the libevent handle, which
is that case we didn't, and crashes on an assert.

Review URL: http://codereview.chromium.org/12648


git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@6223 0039d316-1c4b-4281-b951-d872f2087c98

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