Revert of Introduce v8::MicrotasksScope.

Revert of Introduce v8::MicrotasksScope. (patchset #6 id:100001 of https://codereview.chromium.org/1741893003/ )

Reason for revert:
[Sheriff] Speculative. Seems to break a bunch of webkit tests and causes timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/5103

Please rebase upstream if intended.

Original issue's description:
> Introduce v8::MicrotasksScope.
>
> This scope is used to control microtasks execution when MicrotasksPolicy::kScoped is engaged.
>
> BUG=chromium:585949
> LOG=Y
> TEST=ScopedMicrotasks
>
> Committed: https://crrev.com/db77cec242dbdf8ee26da8232fa930270429f253
> Cr-Commit-Position: refs/heads/master@{#34472}

TBR=jochen@chromium.org,adamk@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:585949
Committed: https://crrev.com/043345a6213ab48a68d71731aa4d54e613fe8ef1
Cr-Commit-Position: refs/heads/master@{#34480}

[Michael Achenbach, 2016-03-04 07:30:37]

Created Revert of Introduce v8::MicrotasksScope.

[commit-bot: I haz the power, 2016-03-04 07:30:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1762943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1762943002/1

[commit-bot: I haz the power, 2016-03-04 07:30:52]

Description was changed from

==========
Revert of Introduce v8::MicrotasksScope. (patchset #6 id:100001 of
https://codereview.chromium.org/1741893003/ )

Reason for revert:
[Sheriff] Speculative. Seems to break a bunch of webkit tests and causes
timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream if intended.

Original issue's description:
> Introduce v8::MicrotasksScope.
> 
> This scope is used to control microtasks execution when
MicrotasksPolicy::kScoped is engaged.
> 
> BUG=chromium:585949
> LOG=Y
> TEST=ScopedMicrotasks
> 
> Committed: https://crrev.com/db77cec242dbdf8ee26da8232fa930270429f253
> Cr-Commit-Position: refs/heads/master@{#34472}

TBR=jochen@chromium.org,adamk@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:585949
==========

to

==========
Revert of Introduce v8::MicrotasksScope. (patchset #6 id:100001 of
https://codereview.chromium.org/1741893003/ )

Reason for revert:
[Sheriff] Speculative. Seems to break a bunch of webkit tests and causes
timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream if intended.

Original issue's description:
> Introduce v8::MicrotasksScope.
> 
> This scope is used to control microtasks execution when
MicrotasksPolicy::kScoped is engaged.
> 
> BUG=chromium:585949
> LOG=Y
> TEST=ScopedMicrotasks
> 
> Committed: https://crrev.com/db77cec242dbdf8ee26da8232fa930270429f253
> Cr-Commit-Position: refs/heads/master@{#34472}

TBR=jochen@chromium.org,adamk@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:585949
==========

[commit-bot: I haz the power, 2016-03-04 07:30:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-04 07:31:25]

Description was changed from

==========
Revert of Introduce v8::MicrotasksScope. (patchset #6 id:100001 of
https://codereview.chromium.org/1741893003/ )

Reason for revert:
[Sheriff] Speculative. Seems to break a bunch of webkit tests and causes
timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream if intended.

Original issue's description:
> Introduce v8::MicrotasksScope.
> 
> This scope is used to control microtasks execution when
MicrotasksPolicy::kScoped is engaged.
> 
> BUG=chromium:585949
> LOG=Y
> TEST=ScopedMicrotasks
> 
> Committed: https://crrev.com/db77cec242dbdf8ee26da8232fa930270429f253
> Cr-Commit-Position: refs/heads/master@{#34472}

TBR=jochen@chromium.org,adamk@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:585949
==========

to

==========
Revert of Introduce v8::MicrotasksScope. (patchset #6 id:100001 of
https://codereview.chromium.org/1741893003/ )

Reason for revert:
[Sheriff] Speculative. Seems to break a bunch of webkit tests and causes
timeouts:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/bui...

Please rebase upstream if intended.

Original issue's description:
> Introduce v8::MicrotasksScope.
>
> This scope is used to control microtasks execution when
MicrotasksPolicy::kScoped is engaged.
>
> BUG=chromium:585949
> LOG=Y
> TEST=ScopedMicrotasks
>
> Committed: https://crrev.com/db77cec242dbdf8ee26da8232fa930270429f253
> Cr-Commit-Position: refs/heads/master@{#34472}

TBR=jochen@chromium.org,adamk@chromium.org,dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:585949

Committed: https://crrev.com/043345a6213ab48a68d71731aa4d54e613fe8ef1
Cr-Commit-Position: refs/heads/master@{#34480}
==========

[commit-bot: I haz the power, 2016-03-04 07:31:26]

Patchset 1 (id:??) landed as
https://crrev.com/043345a6213ab48a68d71731aa4d54e613fe8ef1
Cr-Commit-Position: refs/heads/master@{#34480}

[Michael Achenbach, 2016-03-04 10:08:29]

FYI: All bots turned green after this revert.