Remove isolate arg from EmbedderHeapTracer methods.

Remove isolate arg from EmbedderHeapTracer methods.

As the code on the blink side sits down, we realize we don't need isolate arg
anymore. As the heap tracer is set per isolate, it can actually be confusing if
the isolate passed as argument is always the same as the isolate the heap tracer
was set for. Wdyt?

BUG=468240
LOG=no

Committed: https://crrev.com/39939eebf84e8f62b9fffa46b0e18563e800516e
Cr-Commit-Position: refs/heads/master@{#35620}

[Marcel Hlopko, 2016-04-19 11:11:00]

hlopko@chromium.org changed reviewers:
+ hpayer@chromium.org, jochen@chromium.org

[Marcel Hlopko, 2016-04-19 11:11:14]

Ptal

[Hannes Payer (out of office), 2016-04-19 12:26:06]

lgtm

[Marcel Hlopko, 2016-04-19 12:26:29]

The CQ bit was checked by hlopko@chromium.org

[commit-bot: I haz the power, 2016-04-19 12:26:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1900953003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1900953003/1

[commit-bot: I haz the power, 2016-04-19 12:53:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-19 12:55:05]

Description was changed from

==========
Remove isolate arg from EmbedderHeapTracer methods.

As the code on the blink side sits down, we realize we don't need isolate arg
anymore. As the heap tracer is set per isolate, it can actually be confusing if
the isolate passed as argument is always the same as the isolate the heap tracer
was set for. Wdyt?

BUG=468240
LOG=no
==========

to

==========
Remove isolate arg from EmbedderHeapTracer methods.

As the code on the blink side sits down, we realize we don't need isolate arg
anymore. As the heap tracer is set per isolate, it can actually be confusing if
the isolate passed as argument is always the same as the isolate the heap tracer
was set for. Wdyt?

BUG=468240
LOG=no

Committed: https://crrev.com/39939eebf84e8f62b9fffa46b0e18563e800516e
Cr-Commit-Position: refs/heads/master@{#35620}
==========

[commit-bot: I haz the power, 2016-04-19 12:55:06]

Patchset 1 (id:??) landed as
https://crrev.com/39939eebf84e8f62b9fffa46b0e18563e800516e
Cr-Commit-Position: refs/heads/master@{#35620}