Reland Add V8.Execute histogram to measure time spent executing JS code.

Reland Add V8.Execute histogram to measure time spent executing JS code.

Adds a V8.Execute histogram to measure the amount of time spent executing
JS code.

BUG=v8:4865
LOG=N

Committed: https://crrev.com/48a1c5667a0a96328ec35ecc9fb5b9906dd9c022
Cr-Commit-Position: refs/heads/master@{#36245}

[rmcilroy, 2016-05-13 13:47:56]

Patchset #2 (id:20001) has been deleted

[rmcilroy, 2016-05-13 13:48:33]

Patchset #2 (id:40001) has been deleted

[rmcilroy, 2016-05-13 13:50:24]

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

[rmcilroy, 2016-05-13 13:50:25]

Original in PS1, fix for roll in PS2. PTAL, thanks.

[Camillo Bruni, 2016-05-13 13:58:31]

lgtm

[rmcilroy, 2016-05-13 14:13:21]

The CQ bit was checked by rmcilroy@chromium.org

[commit-bot: I haz the power, 2016-05-13 14:13:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1976963002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1976963002/60001

[commit-bot: I haz the power, 2016-05-13 14:44:19]

Committed patchset #2 (id:60001)

[commit-bot: I haz the power, 2016-05-13 14:46:17]

Description was changed from

==========
Reland Add V8.Execute histogram to measure time spent executing JS code.

Adds a V8.Execute histogram to measure the amount of time spent executing
JS code.

BUG=v8:4865
LOG=N
==========

to

==========
Reland Add V8.Execute histogram to measure time spent executing JS code.

Adds a V8.Execute histogram to measure the amount of time spent executing
JS code.

BUG=v8:4865
LOG=N

Committed: https://crrev.com/48a1c5667a0a96328ec35ecc9fb5b9906dd9c022
Cr-Commit-Position: refs/heads/master@{#36245}
==========

[commit-bot: I haz the power, 2016-05-13 14:46:18]

Patchset 2 (id:??) landed as
https://crrev.com/48a1c5667a0a96328ec35ecc9fb5b9906dd9c022
Cr-Commit-Position: refs/heads/master@{#36245}