[hydrogen] Add crash-hunting instrumentation to Hydrogen too

[hydrogen] Add crash-hunting instrumentation to Hydrogen too

This extends instrumentation added in r30683 and r30768 to cover
the possibility that the root cause we're after is in optimized code.

This CL is intended to be reverted in a couple of days, but should
cause no harm while it's in the tree (we would crash anyway).

BUG=chromium:527994
LOG=n

Committed: https://crrev.com/491b9e29a0909374eb75334632438509f1afc732
Cr-Commit-Position: refs/heads/master@{#30819}

[Jakob Kummerow, 2015-09-17 19:44:56]

jkummerow@chromium.org changed reviewers:
+ mvstanton@chromium.org

[mvstanton, 2015-09-17 21:13:35]

LGTM but I'd like to attach the bug number to the 2 (or 3?) places we've now
instrumented the code. If the similar comment in those places could include the
bug number I'll sleep easier about finding all these things and removing them
once the bug is fixed and we are fat and happy :).

[Jakob Kummerow, 2015-09-18 08:14:09]

ACK, new patch set uploaded.

[Jakob Kummerow, 2015-09-18 08:14:17]

The CQ bit was checked by jkummerow@chromium.org

[Jakob Kummerow, 2015-09-18 08:14:17]

The patchset sent to the CQ was uploaded after l-g-t-m from
mvstanton@chromium.org
Link to the patchset: https://codereview.chromium.org/1348823003/#ps20001
(title: "add bug number to TODO comments")

[commit-bot: I haz the power, 2015-09-18 08:14:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1348823003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1348823003/20001

[commit-bot: I haz the power, 2015-09-18 08:23:13]

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

[commit-bot: I haz the power, 2015-09-18 08:23:14]

Try jobs failed on following builders:
  v8_mac_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_mac_rel/builds/9876)

[Jakob Kummerow, 2015-09-18 08:49:47]

The CQ bit was checked by jkummerow@chromium.org

[Jakob Kummerow, 2015-09-18 08:49:48]

The patchset sent to the CQ was uploaded after l-g-t-m from
mvstanton@chromium.org
Link to the patchset: https://codereview.chromium.org/1348823003/#ps40001
(title: "add missing heap object check")

[commit-bot: I haz the power, 2015-09-18 08:49:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1348823003/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1348823003/40001

[commit-bot: I haz the power, 2015-09-18 09:15:45]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-09-18 09:15:57]

Patchset 3 (id:??) landed as
https://crrev.com/491b9e29a0909374eb75334632438509f1afc732
Cr-Commit-Position: refs/heads/master@{#30819}