Revert of Do V8 GC ASAP if system memory is pressured

Revert of Do V8 GC ASAP if system memory is pressured (patchset #13 id:240001 of https://codereview.chromium.org/1749073002/ )

Reason for revert:
Crash in CallOnForegroundThread
BUG=609056
Original issue's description:
> Do V8 GC ASAP if system memory is pressured
>
> Currently after receiving memory pressure notification, Chrome posts
> asynchronous task to renderer main thread to trigger V8 GC. If renderer
> main thread is busy, purging memory task will be postponed running,
> which increases OOM risk.
>
> The CL can send memory pressure notification to renderer main thread
> synchronously and trigger V8 GC while V8 is in the middle of executing
> JavaScript.
>
> The CL depends on CL 1813963002
>
> BUG=590975
>
> Committed: https://crrev.com/f80422e52658fd87d4159bfeeddd703bae1d4180
> Cr-Commit-Position: refs/heads/master@{#391167}

TBR=esprehn@chromium.org,jochen@chromium.org,kinuko@chromium.org,mark@chromium.org,rmcilroy@chromium.org,ulan@chromium.org,hong.zheng@intel.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=590975
Committed: https://crrev.com/78980b9332da0264f52bd4ff0b6aeef23cdc21e9
Cr-Commit-Position: refs/heads/master@{#391636}

[Vitaly Buka (NO REVIEWS), 2016-05-04 17:30:32]

Created Revert of Do V8 GC ASAP if system memory is pressured

[commit-bot: I haz the power, 2016-05-04 17:30:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1953483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1953483002/1

[commit-bot: I haz the power, 2016-05-04 17:31:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1953483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1953483002/1

[commit-bot: I haz the power, 2016-05-04 18:02:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1953483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1953483002/1

[commit-bot: I haz the power, 2016-05-04 18:08:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1953483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1953483002/1

[commit-bot: I haz the power, 2016-05-04 18:32:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1953483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1953483002/1

[commit-bot: I haz the power, 2016-05-04 19:02:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1953483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1953483002/1

[Vitaly Buka (NO REVIEWS), 2016-05-04 20:36:00]

The CQ bit was unchecked by vitalybuka@chromium.org

[Vitaly Buka (NO REVIEWS), 2016-05-04 20:36:07]

The CQ bit was checked by vitalybuka@chromium.org

[commit-bot: I haz the power, 2016-05-04 20:36:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1953483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1953483002/1

[commit-bot: I haz the power, 2016-05-04 20:50:58]

Description was changed from

==========
Revert of Do V8 GC ASAP if system memory is pressured (patchset #13 id:240001 of
https://codereview.chromium.org/1749073002/ )

Reason for revert:
Crash in CallOnForegroundThread
BUG=609056

Original issue's description:
> Do V8 GC ASAP if system memory is pressured
> 
> Currently after receiving memory pressure notification, Chrome posts
> asynchronous task to renderer main thread to trigger V8 GC. If renderer
> main thread is busy, purging memory task will be postponed running,
> which increases OOM risk.
> 
> The CL can send memory pressure notification to renderer main thread
> synchronously and trigger V8 GC while V8 is in the middle of executing
> JavaScript.
> 
> The CL depends on CL 1813963002
> 
> BUG=590975
> 
> Committed: https://crrev.com/f80422e52658fd87d4159bfeeddd703bae1d4180
> Cr-Commit-Position: refs/heads/master@{#391167}

TBR=esprehn@chromium.org,jochen@chromium.org,kinuko@chromium.org,mark@chromiu...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=590975
==========

to

==========
Revert of Do V8 GC ASAP if system memory is pressured (patchset #13 id:240001 of
https://codereview.chromium.org/1749073002/ )

Reason for revert:
Crash in CallOnForegroundThread
BUG=609056

Original issue's description:
> Do V8 GC ASAP if system memory is pressured
> 
> Currently after receiving memory pressure notification, Chrome posts
> asynchronous task to renderer main thread to trigger V8 GC. If renderer
> main thread is busy, purging memory task will be postponed running,
> which increases OOM risk.
> 
> The CL can send memory pressure notification to renderer main thread
> synchronously and trigger V8 GC while V8 is in the middle of executing
> JavaScript.
> 
> The CL depends on CL 1813963002
> 
> BUG=590975
> 
> Committed: https://crrev.com/f80422e52658fd87d4159bfeeddd703bae1d4180
> Cr-Commit-Position: refs/heads/master@{#391167}

TBR=esprehn@chromium.org,jochen@chromium.org,kinuko@chromium.org,mark@chromiu...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=590975
==========

[commit-bot: I haz the power, 2016-05-04 20:51:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-04 20:52:16]

Description was changed from

==========
Revert of Do V8 GC ASAP if system memory is pressured (patchset #13 id:240001 of
https://codereview.chromium.org/1749073002/ )

Reason for revert:
Crash in CallOnForegroundThread
BUG=609056

Original issue's description:
> Do V8 GC ASAP if system memory is pressured
> 
> Currently after receiving memory pressure notification, Chrome posts
> asynchronous task to renderer main thread to trigger V8 GC. If renderer
> main thread is busy, purging memory task will be postponed running,
> which increases OOM risk.
> 
> The CL can send memory pressure notification to renderer main thread
> synchronously and trigger V8 GC while V8 is in the middle of executing
> JavaScript.
> 
> The CL depends on CL 1813963002
> 
> BUG=590975
> 
> Committed: https://crrev.com/f80422e52658fd87d4159bfeeddd703bae1d4180
> Cr-Commit-Position: refs/heads/master@{#391167}

TBR=esprehn@chromium.org,jochen@chromium.org,kinuko@chromium.org,mark@chromiu...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=590975
==========

to

==========
Revert of Do V8 GC ASAP if system memory is pressured (patchset #13 id:240001 of
https://codereview.chromium.org/1749073002/ )

Reason for revert:
Crash in CallOnForegroundThread
BUG=609056

Original issue's description:
> Do V8 GC ASAP if system memory is pressured
>
> Currently after receiving memory pressure notification, Chrome posts
> asynchronous task to renderer main thread to trigger V8 GC. If renderer
> main thread is busy, purging memory task will be postponed running,
> which increases OOM risk.
>
> The CL can send memory pressure notification to renderer main thread
> synchronously and trigger V8 GC while V8 is in the middle of executing
> JavaScript.
>
> The CL depends on CL 1813963002
>
> BUG=590975
>
> Committed: https://crrev.com/f80422e52658fd87d4159bfeeddd703bae1d4180
> Cr-Commit-Position: refs/heads/master@{#391167}

TBR=esprehn@chromium.org,jochen@chromium.org,kinuko@chromium.org,mark@chromiu...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=590975

Committed: https://crrev.com/78980b9332da0264f52bd4ff0b6aeef23cdc21e9
Cr-Commit-Position: refs/heads/master@{#391636}
==========

[commit-bot: I haz the power, 2016-05-04 20:52:17]

Patchset 1 (id:??) landed as
https://crrev.com/78980b9332da0264f52bd4ff0b6aeef23cdc21e9
Cr-Commit-Position: refs/heads/master@{#391636}