Debugger: ensure that break points are set in code that contain debug break slots.

Debugger: ensure that break points are set in code that contain debug break slots.

We now consistently ignore native and extension scripts for debugging. Only native scripts and extension scripts can disallow lazy compilation. So we can make sure that break points are only set to code that are compiled with debug break slots.

R=mvstanton@chromium.org

Committed: https://crrev.com/77d566c06728ba9aa1a3aa339218ce317c330966
Cr-Commit-Position: refs/heads/master@{#29400}

[Yang, 2015-06-30 11:33:41]

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

[commit-bot: I haz the power, 2015-06-30 11:33:45]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1216193002/1

[commit-bot: I haz the power, 2015-06-30 12:01:00]

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

[commit-bot: I haz the power, 2015-06-30 12:01:01]

Dry run: This issue passed the CQ dry run.

[Yang, 2015-06-30 12:03:24]

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

[commit-bot: I haz the power, 2015-06-30 12:03:30]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1216193002/20001

[Yang, 2015-06-30 12:04:06]

The CQ bit was unchecked by yangguo@chromium.org

[mvstanton, 2015-07-01 07:54:25]

Cool, I like the wrapping up of two predicates into IsSubjectToDebugging().
LGTM.

[Yang, 2015-07-01 07:59:29]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-07-01 07:59:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1216193002/20001

[commit-bot: I haz the power, 2015-07-01 08:01:19]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-01 08:01:34]

Patchset 2 (id:??) landed as
https://crrev.com/77d566c06728ba9aa1a3aa339218ce317c330966
Cr-Commit-Position: refs/heads/master@{#29400}