[Gin] Enable V8 Ignition interpreter for low end Android devices.

[Gin] Enable V8 Ignition interpreter for low end Android devices.

Enable V8 Ignition interpreter for Ignition on low-end (Svelte) devices.
This is still controlled by a field-trial flag and so can be turned off
in the field if necessary.

Perf Sheriffs: This CL is likely to cause regressions on some benchmarks
This is expected, as we are trading off memory usage for benchmark
performance on low-memory devices, but please file bugs against me
for tracking.

BUG=v8:4280, v8:4868, 594228
Committed: https://crrev.com/f407ceccdc10ccd6e277fb72675fcf0be040cded
Cr-Commit-Position: refs/heads/master@{#402472}

[rmcilroy, 2016-06-28 13:55:22]

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

[rmcilroy, 2016-06-28 13:55:23]

Jochen: After chatting with the Chrome Android TPMs we
decided that rather than turning on Ignition via a field
trial and ramping up via an experiment on Stable, instead
we will enable by default for low-end devices, and use the
feature as a kill-switch if necessary.

PTAL, thanks.

[rmcilroy, 2016-06-28 13:55:27]

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

[commit-bot: I haz the power, 2016-06-28 13:55:53]

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

[jochen (gone - plz use gerrit), 2016-06-28 14:08:15]

lgtm

[commit-bot: I haz the power, 2016-06-28 15:00:36]

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

[commit-bot: I haz the power, 2016-06-28 15:00:37]

Dry run: This issue passed the CQ dry run.

[rmcilroy, 2016-06-28 15:04:34]

The CQ bit was checked by rmcilroy@chromium.org

[commit-bot: I haz the power, 2016-06-28 15:05:03]

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, 2016-06-28 15:10:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-28 15:12:45]

Description was changed from

==========
[Gin] Enable V8 Ignition interpreter for low end Android devices.

Enable V8 Ignition interpreter for Ignition on low-end (Svelte) devices.
This is still controlled by a field-trial flag and so can be turned off
in the field if necessary.

Perf Sheriffs: This CL is likely to cause regressions on some benchmarks
This is expected, as we are trading off memory usage for benchmark
performance on low-memory devices, but please file bugs against me
for tracking.

BUG=v8:4280,v8:4868,594228
==========

to

==========
[Gin] Enable V8 Ignition interpreter for low end Android devices.

Enable V8 Ignition interpreter for Ignition on low-end (Svelte) devices.
This is still controlled by a field-trial flag and so can be turned off
in the field if necessary.

Perf Sheriffs: This CL is likely to cause regressions on some benchmarks
This is expected, as we are trading off memory usage for benchmark
performance on low-memory devices, but please file bugs against me
for tracking.

BUG=v8:4280,v8:4868,594228

Committed: https://crrev.com/f407ceccdc10ccd6e277fb72675fcf0be040cded
Cr-Commit-Position: refs/heads/master@{#402472}
==========

[commit-bot: I haz the power, 2016-06-28 15:12:46]

Patchset 1 (id:??) landed as
https://crrev.com/f407ceccdc10ccd6e277fb72675fcf0be040cded
Cr-Commit-Position: refs/heads/master@{#402472}