[Merge to 2881 for release cherry-picking] Re-enable the QUIC v33 hacks. protected by FLAGS_quic_re…

[Merge to 2881 for release cherry-picking] Re-enable the QUIC v33 hacks. protected by FLAGS_quic_remove_v33_hacks2

Effectively, this is rolling back internal change 132908836: Deprecate FLAGS_quic_remove_v33_hacks.
BUG=655846, 655763
R=rch@chromium.org

Review URL: https://codereview.chromium.org/2426823003 .

Cr-Commit-Position: refs/heads/master@{#426066}
(cherry picked from commit a6fc494d67bf62c40a8fc9eb515bdf27c772d2fb)

Committed: https://chromium.googlesource.com/chromium/src/+/9b9fe325c47b422505463c184e7d76034a942e33

[mef, 2016-10-21 19:01:08]

PTAL

[Ryan Hamilton, 2016-10-21 19:01:50]

lgtm

[mef, 2016-10-21 19:06:08]

Description was changed from

==========
[Merge to 2881 for release cherry-picking] Re-enable the QUIC v33 hacks.
protected by FLAGS_quic_remove_v33_hacks2

Effectively, this is rolling back internal change 132908836: Deprecate
FLAGS_quic_remove_v33_hacks.
BUG=655846,655763
R=rch@chromium.org

Review URL: https://codereview.chromium.org/2426823003 .

Cr-Commit-Position: refs/heads/master@{#426066}
(cherry picked from commit a6fc494d67bf62c40a8fc9eb515bdf27c772d2fb)
==========

to

==========
[Merge to 2881 for release cherry-picking] Re-enable the QUIC v33 hacks.
protected by FLAGS_quic_remove_v33_hacks2

Effectively, this is rolling back internal change 132908836: Deprecate
FLAGS_quic_remove_v33_hacks.
BUG=655846,655763
R=rch@chromium.org

Review URL: https://codereview.chromium.org/2426823003 .

Cr-Commit-Position: refs/heads/master@{#426066}
(cherry picked from commit a6fc494d67bf62c40a8fc9eb515bdf27c772d2fb)

Committed:
https://chromium.googlesource.com/chromium/src/+/9b9fe325c47b422505463c184e7d...
==========

[mef, 2016-10-21 19:06:09]

Committed patchset #1 (id:1) manually as
9b9fe325c47b422505463c184e7d76034a942e33 (presubmit successful).