Remove code for old WebSocket protocols from WebSocketJob and helpers for it

BUG=

Review URL: https://codereview.chromium.org/26247002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227750 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227750