Revert 72421 (broke tests) - Enable TCP Keep-Alive packets for Windows.
Revert 72421 (broke tests) - Enable TCP Keep-Alive packets for Windows.

45s until first TCP Keep-Alive and 45s in between keep alives.

BUG=27400
TEST=Run Wireshark, make sure TCP Keep-Alive packets are sent.

Review URL: http://codereview.chromium.org/6300013

TBR=willchan@chromium.org
Review URL: http://codereview.chromium.org/6371010

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@72426 0039d316-1c4b-4281-b951-d872f2087c98

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