[Tracing] Remove TRACE_EVENT_SCOPED_CONTEXT from V8 temporarily

[Tracing] Remove TRACE_EVENT_SCOPED_CONTEXT from V8 temporarily

The current trace scoping failed to accomplish what it intended to do
it failed in 2 aspects:
First, when new trace events were added in
https://codereview.chromium.org/1770353002/ they escaped the scopes.
Secondly, a webgl code interacts with the V8 Objects directly using
the EXECUTION_PRIMITIVE context that does not generate any TRACE_EVENTs
resulting in a lot of empty scopes (breaking analysis on TBM webgl benchmarks)
https://crbug.com/590761.

I am removing the calls for now until figuring out a better approach for both issues.

BUG=590761, v8:4565
LOG=N

Committed: https://crrev.com/7a7d5815dbe292c587d696b963409af746e5bd9a
Cr-Commit-Position: refs/heads/master@{#34799}

[fmeawad, 2016-03-15 15:46:45]

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

[commit-bot: I haz the power, 2016-03-15 15:46:52]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1807433002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1807433002/1

[fmeawad, 2016-03-15 15:46:58]

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

[fmeawad, 2016-03-15 15:46:59]

PTAL.

[commit-bot: I haz the power, 2016-03-15 16:06:42]

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

[commit-bot: I haz the power, 2016-03-15 16:06:43]

Dry run: This issue passed the CQ dry run.

[jochen (gone - plz use gerrit), 2016-03-15 20:27:57]

lgtm

[fmeawad, 2016-03-15 20:42:51]

The CQ bit was checked by fmeawad@chromium.org

[commit-bot: I haz the power, 2016-03-15 20:42:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1807433002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1807433002/1

[commit-bot: I haz the power, 2016-03-15 20:45:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-15 20:46:24]

Description was changed from

==========
[Tracing] Remove TRACE_EVENT_SCOPED_CONTEXT from V8 temporarily

The current trace scoping failed to accomplish what it intended to do
it failed in 2 aspects:
First, when new trace events were added in
https://codereview.chromium.org/1770353002/ they escaped the scopes.
Secondly, a webgl code interacts with the V8 Objects directly using
the EXECUTION_PRIMITIVE context that does not generate any TRACE_EVENTs
resulting in a lot of empty scopes (breaking analysis on TBM webgl benchmarks)
https://crbug.com/590761.

I am removing the calls for now until figuring out a better approach for both
issues.

BUG=590761,v8:4565
LOG=N
==========

to

==========
[Tracing] Remove TRACE_EVENT_SCOPED_CONTEXT from V8 temporarily

The current trace scoping failed to accomplish what it intended to do
it failed in 2 aspects:
First, when new trace events were added in
https://codereview.chromium.org/1770353002/ they escaped the scopes.
Secondly, a webgl code interacts with the V8 Objects directly using
the EXECUTION_PRIMITIVE context that does not generate any TRACE_EVENTs
resulting in a lot of empty scopes (breaking analysis on TBM webgl benchmarks)
https://crbug.com/590761.

I am removing the calls for now until figuring out a better approach for both
issues.

BUG=590761,v8:4565
LOG=N

Committed: https://crrev.com/7a7d5815dbe292c587d696b963409af746e5bd9a
Cr-Commit-Position: refs/heads/master@{#34799}
==========

[commit-bot: I haz the power, 2016-03-15 20:46:24]

Patchset 1 (id:??) landed as
https://crrev.com/7a7d5815dbe292c587d696b963409af746e5bd9a
Cr-Commit-Position: refs/heads/master@{#34799}