Update Token Binding code to draft 06

BUG=

Review-Url: https://codereview.chromium.org/2013303002
Cr-Original-Commit-Position: refs/heads/master@{#402364}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 2840f95e176111e2f468382a51256dc0a34ec547
3 files changed