[builtins] add CodeStubAssembler::IsDebugActive() helper

[builtins] add CodeStubAssembler::IsDebugActive() helper

Utility used by Promise builtins implemented in TFJ/TFS

BUG=v8:5046
R=bmeurer@chromium.org, gsathya@chromium.org, yangguo@chromium.org, adamk@chromium.org

Committed: https://crrev.com/d59c2cf1b40b4626605632a4e2e055531776c6a4
Cr-Commit-Position: refs/heads/master@{#41123}

[caitp, 2016-11-20 05:01:54]

The CQ bit was checked by caitp@igalia.com to run a CQ dry run

[commit-bot: I haz the power, 2016-11-20 05:02:04]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[caitp, 2016-11-20 05:02:29]

Implemented after offline discussion with Sathya, hopefully this helps with the
Promise work.

[commit-bot: I haz the power, 2016-11-20 06:06:20]

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

[commit-bot: I haz the power, 2016-11-20 06:06:20]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2016-11-20 17:34:27]

lgtm

[caitp, 2016-11-20 17:55:13]

The CQ bit was checked by caitp@igalia.com

[commit-bot: I haz the power, 2016-11-20 17:55:15]

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, 2016-11-20 17:56:52]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1479664513384440, "parent_rev":
["d60cc75ff3587f723935eece9bb983c16c5d4b59", null], "commit_rev":
["670f155e6f2b0a6e4b084b51859d8f025d5fdb44", null]}

[commit-bot: I haz the power, 2016-11-20 17:56:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-20 17:57:16]

Description was changed from

==========
[builtins] add CodeStubAssembler::IsDebugActive() helper

Utility used by Promise builtins implemented in TFJ/TFS

BUG=v8:5046
R=bmeurer@chromium.org, gsathya@chromium.org, yangguo@chromium.org,
adamk@chromium.org
==========

to

==========
[builtins] add CodeStubAssembler::IsDebugActive() helper

Utility used by Promise builtins implemented in TFJ/TFS

BUG=v8:5046
R=bmeurer@chromium.org, gsathya@chromium.org, yangguo@chromium.org,
adamk@chromium.org

Committed: https://crrev.com/d59c2cf1b40b4626605632a4e2e055531776c6a4
Cr-Commit-Position: refs/heads/master@{#41123}
==========

[commit-bot: I haz the power, 2016-11-20 17:57:17]

Patchset 1 (id:??) landed as
https://crrev.com/d59c2cf1b40b4626605632a4e2e055531776c6a4
Cr-Commit-Position: refs/heads/master@{#41123}