net: don't always add TLS padding.

In order to flush out any problems with padding, Chrome has always been
adding it, even when the ClientHello was small enough not to need it.

Since that change is in Chrome 33 (and the Chrome 34 branch), it's time
to remove it.

BUG=315828

Review URL: https://codereview.chromium.org/171713011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252421 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed