[bootstrapper] Fix raw pointer use during potential GC.

[bootstrapper] Fix raw pointer use during potential GC.

This should fix a weird random crash we keep seeing on Linux nosnap
bot with TurboFan enabled.

BUG=v8:4435, v8:4423
LOG=n
R=mvstanton@chromium.org

Committed: https://crrev.com/8611fb31a273ebcf2f0cb2a36929fe48f52e8fd5
Cr-Commit-Position: refs/heads/master@{#30968}

[Benedikt Meurer, 2015-09-28 09:20:22]

bmeurer@chromium.org changed reviewers:
+ machenbach@chromium.org

[Benedikt Meurer, 2015-09-28 09:20:22]

bmeurer@chromium.org changed required reviewers:
+ mvstanton@chromium.org

[Benedikt Meurer, 2015-09-28 09:20:22]

Michael S.: PTAL
Michael A.: FYI

(we need more Michael's)

[mvstanton, 2015-09-28 09:21:37]

Thanks Benedikt.
I have to port this back to 4.6 :p.
LGTM.

[Benedikt Meurer, 2015-09-28 09:39:19]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-09-28 09:39:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1374663002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1374663002/1

[commit-bot: I haz the power, 2015-09-28 09:42:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-28 09:42:32]

Patchset 1 (id:??) landed as
https://crrev.com/8611fb31a273ebcf2f0cb2a36929fe48f52e8fd5
Cr-Commit-Position: refs/heads/master@{#30968}

[Michael Starzinger, 2015-10-01 17:37:48]

https://codereview.chromium.org/1374663002/diff/1/src/bootstrapper.cc
File src/bootstrapper.cc (left):

https://codereview.chromium.org/1374663002/diff/1/src/bootstrapper.cc#oldcode...
src/bootstrapper.cc:1812:
*TypeFeedbackVector::CreatePushAppliedArgumentsVector(isolate));
Holy sh*t, GCMole didn't find this, that is concerning. :(

[Benedikt Meurer, 2015-10-01 17:52:23]

https://codereview.chromium.org/1374663002/diff/1/src/bootstrapper.cc
File src/bootstrapper.cc (left):

https://codereview.chromium.org/1374663002/diff/1/src/bootstrapper.cc#oldcode...
src/bootstrapper.cc:1812:
*TypeFeedbackVector::CreatePushAppliedArgumentsVector(isolate));
On 2015/10/01 17:37:48, Michael Starzinger wrote:
> Holy sh*t, GCMole didn't find this, that is concerning. :(

Good point. Can you look into this Michi?

[Michael Achenbach, 2015-10-01 19:07:18]

machenbach@chromium.org changed reviewers:
+ hablich@chromium.org

[Michael Achenbach, 2015-10-01 19:07:19]

FYI: Michael H. for porting back :)