remove the chrome/etag workaround, to see if the issue is repro-able anymore https://code.google.com/p/chromium/issues/detail?id=105824

Hello @nicks, 

Please review the following commits I made in branch 'nick-etag'.

5a853ea37cfbc429dca8e68056b3fb2307705de6 (2014-07-16 20:03:06 -0700)
remove the chrome/etag workaround, to see if the issue is repro-able anymore https://code.google.com/p/chromium/issues/detail?id=105824

R=@nicks