Reland of Ensure counters are initialized, to avoid init on non-joinable threads.

Reland of Ensure counters are initialized, to avoid init on non-joinable threads. (patchset #1 id:1 of https://codereview.chromium.org/2812653002/ )

Reason for revert:
Appears to be a flake. Both jgruber and I tried to repro locally and failed. Also change has little change of having had caused those failures.

Original issue's description:
> Revert of Ensure counters are initialized, to avoid init on non-joinable threads. (patchset #1 id:1 of https://codereview.chromium.org/2812543002/ )
> 
> Reason for revert:
> https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20gyp/builds/5221
> 
> Original issue's description:
> > Ensure counters are initialized, to avoid init on non-joinable threads.
> > 
> > This occurs in the wasm scenario described in the referenced bug.
> > DecodeWasmModule collects statistics. Blink inserts a CreateHistogramCallback that
> > can't instantiate a histogram on non-joinable threads. Turns out, DecodeWasmModule
> > is scheduled on such a thread, now that we have async compilation.
> > 
> > This fix pre-initializes histograms when the callback is applied, which is assumed to
> > be in a context that can carry out the instantiation. In Blink, this happens on the main
> > thread.
> > 
> > BUG=chromium:709684
> > 
> > Review-Url: https://codereview.chromium.org/2812543002
> > Cr-Commit-Position: refs/heads/master@{#44522}
> > Committed: https://chromium.googlesource.com/v8/v8/+/022e7ddf232b0696eb595769fa702463c417db5e
> 
> TBR=jochen@chromium.org,mtrofin@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:709684
> 
> Review-Url: https://codereview.chromium.org/2812653002
> Cr-Commit-Position: refs/heads/master@{#44527}
> Committed: https://chromium.googlesource.com/v8/v8/+/038bafcb8c0435bc4130228237124331295d4713

TBR=jochen@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:709684
Review-Url: https://codereview.chromium.org/2813673002
Cr-Commit-Position: refs/heads/master@{#44529}
Committed: https://chromium.googlesource.com/v8/v8/+/1ee2a998fa4c8842690467c96286a97b506f1424

[Mircea Trofin, 2017-04-10 15:15:32]

The CQ bit was checked by mtrofin@chromium.org

[Mircea Trofin, 2017-04-10 15:15:32]

Created Reland of Ensure counters are initialized, to avoid init on non-joinable
threads.

[commit-bot: I haz the power, 2017-04-10 15:15:36]

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, 2017-04-10 15:15:41]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491837332151460, "parent_rev":
"db61537afcbc4ed1914152aad302a9788bc80d0f", "commit_rev":
"1ee2a998fa4c8842690467c96286a97b506f1424"}

[commit-bot: I haz the power, 2017-04-10 15:15:48]

Description was changed from

==========
Reland of Ensure counters are initialized, to avoid init on non-joinable
threads. (patchset #1 id:1 of https://codereview.chromium.org/2812653002/ )

Reason for revert:
Appears to be a flake. Both jgruber and I tried to repro locally and failed.
Also change has little change of having had caused those failures.

Original issue's description:
> Revert of Ensure counters are initialized, to avoid init on non-joinable
threads. (patchset #1 id:1 of https://codereview.chromium.org/2812543002/ )
> 
> Reason for revert:
>
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20gyp/builds...
> 
> Original issue's description:
> > Ensure counters are initialized, to avoid init on non-joinable threads.
> > 
> > This occurs in the wasm scenario described in the referenced bug.
> > DecodeWasmModule collects statistics. Blink inserts a
CreateHistogramCallback that
> > can't instantiate a histogram on non-joinable threads. Turns out,
DecodeWasmModule
> > is scheduled on such a thread, now that we have async compilation.
> > 
> > This fix pre-initializes histograms when the callback is applied, which is
assumed to
> > be in a context that can carry out the instantiation. In Blink, this happens
on the main
> > thread.
> > 
> > BUG=chromium:709684
> > 
> > Review-Url: https://codereview.chromium.org/2812543002
> > Cr-Commit-Position: refs/heads/master@{#44522}
> > Committed:
https://chromium.googlesource.com/v8/v8/+/022e7ddf232b0696eb595769fa702463c41...
> 
> TBR=jochen@chromium.org,mtrofin@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:709684
> 
> Review-Url: https://codereview.chromium.org/2812653002
> Cr-Commit-Position: refs/heads/master@{#44527}
> Committed:
https://chromium.googlesource.com/v8/v8/+/038bafcb8c0435bc4130228237124331295...

TBR=jochen@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:709684
==========

to

==========
Reland of Ensure counters are initialized, to avoid init on non-joinable
threads. (patchset #1 id:1 of https://codereview.chromium.org/2812653002/ )

Reason for revert:
Appears to be a flake. Both jgruber and I tried to repro locally and failed.
Also change has little change of having had caused those failures.

Original issue's description:
> Revert of Ensure counters are initialized, to avoid init on non-joinable
threads. (patchset #1 id:1 of https://codereview.chromium.org/2812543002/ )
> 
> Reason for revert:
>
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20gyp/builds...
> 
> Original issue's description:
> > Ensure counters are initialized, to avoid init on non-joinable threads.
> > 
> > This occurs in the wasm scenario described in the referenced bug.
> > DecodeWasmModule collects statistics. Blink inserts a
CreateHistogramCallback that
> > can't instantiate a histogram on non-joinable threads. Turns out,
DecodeWasmModule
> > is scheduled on such a thread, now that we have async compilation.
> > 
> > This fix pre-initializes histograms when the callback is applied, which is
assumed to
> > be in a context that can carry out the instantiation. In Blink, this happens
on the main
> > thread.
> > 
> > BUG=chromium:709684
> > 
> > Review-Url: https://codereview.chromium.org/2812543002
> > Cr-Commit-Position: refs/heads/master@{#44522}
> > Committed:
https://chromium.googlesource.com/v8/v8/+/022e7ddf232b0696eb595769fa702463c41...
> 
> TBR=jochen@chromium.org,mtrofin@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:709684
> 
> Review-Url: https://codereview.chromium.org/2812653002
> Cr-Commit-Position: refs/heads/master@{#44527}
> Committed:
https://chromium.googlesource.com/v8/v8/+/038bafcb8c0435bc4130228237124331295...

TBR=jochen@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:709684

Review-Url: https://codereview.chromium.org/2813673002
Cr-Commit-Position: refs/heads/master@{#44529}
Committed:
https://chromium.googlesource.com/v8/v8/+/1ee2a998fa4c8842690467c96286a97b506...
==========

[commit-bot: I haz the power, 2017-04-10 15:15:50]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/1ee2a998fa4c8842690467c96286a97b506...