[Gin] Add V8NoTurbo experiment to disable Ignition+TurboFan.

[Gin] Add V8NoTurbo experiment to disable Ignition+TurboFan.

Adds a V8NoTurbo experiment to disable the new Ignition + TurboFan
compiler pipeline. Also changes the description of V8Future to refer to
future V8 execution features rather than the new compilation pipeline
which will soon be enabled by default.

BUG=chromium:692409
Review-Url: https://codereview.chromium.org/2740543002
Cr-Commit-Position: refs/heads/master@{#455259}
Committed: https://chromium.googlesource.com/chromium/src/+/0a3bbffbf93db594e56cf32370c78c9a4bafd128

[rmcilroy, 2017-03-07 14:08:41]

The CQ bit was checked by rmcilroy@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-07 14:09:15]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[rmcilroy, 2017-03-07 14:11:51]

rmcilroy@chromium.org changed reviewers:
+ jochen@chromium.org

[rmcilroy, 2017-03-07 14:11:52]

Jochen, PTAL thanks. This relies on
https://chromium-review.googlesource.com/c/451320/ which fixes --no-turbo to do
what we want regarding flag implications. 

mvstanton / machenbach / mstarzinger: FYI. We should land this before landing
the I+TF flag flip CL.

[Michael Achenbach, 2017-03-07 14:18:19]

machenbach@chromium.org changed reviewers:
+ machenbach@chromium.org

[Michael Achenbach, 2017-03-07 14:18:19]

lgtm - no histogram.xml change required?

[jochen (gone - plz use gerrit), 2017-03-07 14:31:21]

lgtm

[jochen (gone - plz use gerrit), 2017-03-07 14:31:42]

if you need an histograms.xml change, please get somebody from the metrics team
to approve

[commit-bot: I haz the power, 2017-03-07 14:46:22]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-03-07 14:46:23]

Dry run: Try jobs failed on following builders:
  linux_chromium_tsan_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[rmcilroy, 2017-03-07 15:05:27]

The CQ bit was checked by rmcilroy@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-07 15:05:51]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[rmcilroy, 2017-03-07 15:07:26]

Description was changed from

==========
[Gin] Add V8NoTurbo experiment to disable Ignition+TurboFan.

Adds a V8NoTurbo experiment to disable the new Ignition + TurboFan
compiler pipeline. Also changes the description of V8Future to refer to
future V8 execution features rather than the new compilation pipeline
which will soon be enabled by default.

BUG=chromium:692409
==========

to

==========
[Gin] Add V8NoTurbo experiment to disable Ignition+TurboFan.

Adds a V8NoTurbo experiment to disable the new Ignition + TurboFan
compiler pipeline. Also changes the description of V8Future to refer to
future V8 execution features rather than the new compilation pipeline
which will soon be enabled by default.

BUG=chromium:692409
==========

[rmcilroy, 2017-03-07 15:07:26]

rmcilroy@chromium.org changed reviewers:
+ jwd@chromium.org

[rmcilroy, 2017-03-07 15:07:49]

+jwd - PTAL at histograms.xml change, thanks.

[commit-bot: I haz the power, 2017-03-07 16:25:49]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-03-07 16:25:50]

Dry run: Try jobs failed on following builders:
  win_chromium_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[rmcilroy, 2017-03-07 21:17:08]

rmcilroy@chromium.org changed reviewers:
+ isherman@chromium.org
- jwd@chromium.org

[rmcilroy, 2017-03-07 21:17:09]

Ilya: could you take a look at the histograms.xml change please? We'd like to
land this before tomorrow morning (European time) when we intend to turn on
TurboFan+Ignition by default.

[Michael Achenbach, 2017-03-07 21:45:33]

machenbach@chromium.org changed reviewers:
+ jwd@chromium.org, mpearson@chromium.org, rkaplow@chromium.org

[Michael Achenbach, 2017-03-07 21:45:33]

+ more metrics OWNERS for higher likelihood of getting an approval by tomorrow
morning, PTAL at the histogram change.

[rkaplow, 2017-03-07 21:49:04]

lgtm

[rmcilroy, 2017-03-07 22:29:53]

On 2017/03/07 21:49:04, rkaplow (slow) wrote:
> lgtm

Thanks Robert!

[rmcilroy, 2017-03-07 22:30:00]

The CQ bit was checked by rmcilroy@chromium.org

[rmcilroy, 2017-03-07 22:30:01]

The patchset sent to the CQ was uploaded after l-g-t-m from jochen@chromium.org,
machenbach@chromium.org
Link to the patchset: https://codereview.chromium.org/2740543002/#ps20001
(title: "Add histogram change")

[commit-bot: I haz the power, 2017-03-07 22:30:45]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-07 22:38:23]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1488925800325790,
"parent_rev": "c2c4507a33a1f95eeb9265a3de0344704b1170d7", "commit_rev":
"0a3bbffbf93db594e56cf32370c78c9a4bafd128"}

[commit-bot: I haz the power, 2017-03-07 22:39:04]

Description was changed from

==========
[Gin] Add V8NoTurbo experiment to disable Ignition+TurboFan.

Adds a V8NoTurbo experiment to disable the new Ignition + TurboFan
compiler pipeline. Also changes the description of V8Future to refer to
future V8 execution features rather than the new compilation pipeline
which will soon be enabled by default.

BUG=chromium:692409
==========

to

==========
[Gin] Add V8NoTurbo experiment to disable Ignition+TurboFan.

Adds a V8NoTurbo experiment to disable the new Ignition + TurboFan
compiler pipeline. Also changes the description of V8Future to refer to
future V8 execution features rather than the new compilation pipeline
which will soon be enabled by default.

BUG=chromium:692409

Review-Url: https://codereview.chromium.org/2740543002
Cr-Commit-Position: refs/heads/master@{#455259}
Committed:
https://chromium.googlesource.com/chromium/src/+/0a3bbffbf93db594e56cf32370c7...
==========

[commit-bot: I haz the power, 2017-03-07 22:39:06]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/0a3bbffbf93db594e56cf32370c7...