Debugger: do not reject data parsed in the background when debugging.

Debugger: do not reject data parsed in the background when debugging.

This has become possible since we never compile for debugging in the
first compile pass of a script.

R=vogelheim@chromium.org
BUG=chromium:513335
LOG=N

Committed: https://crrev.com/f67455174b20bc6f1275b8c8d727f067478d53d3
Cr-Commit-Position: refs/heads/master@{#29874}

[vogelheim, 2015-07-27 12:54:58]

lgtm

[Yang, 2015-07-27 13:54:28]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-07-27 13:54:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1255153002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1255153002/1

[commit-bot: I haz the power, 2015-07-27 14:20:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-27 14:20:23]

Patchset 1 (id:??) landed as
https://crrev.com/f67455174b20bc6f1275b8c8d727f067478d53d3
Cr-Commit-Position: refs/heads/master@{#29874}