Make IsProxyBypassed work when there are no bad proxies.

Make IsProxyBypassed work when there are no bad proxies.

Currently, if there are no bad proxies, IsProxyBypassed will cause a
runtime error. This change makes it return (False, []) as expected.

BUG=427666
Committed: https://crrev.com/b904b15f3e24cbcaaec47cc3c9a88c4952ca116c
Cr-Commit-Position: refs/heads/master@{#301470}

[sclittle, 2014-10-23 22:14:35]

sclittle@chromium.org changed reviewers:
+ bengr@chromium.org, bolian@chromium.org

[bolian, 2014-10-23 22:29:55]

lgtm

[sclittle, 2014-10-27 18:28:51]

The CQ bit was checked by sclittle@chromium.org

[commit-bot: I haz the power, 2014-10-27 18:30:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/664483004/1

[commit-bot: I haz the power, 2014-10-27 18:30:20]

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

[commit-bot: I haz the power, 2014-10-27 18:30:21]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[bengr, 2014-10-27 21:18:08]

lgtm, but this needs a bug number.

[sclittle, 2014-10-27 21:30:03]

Added bug number to CL description.

[sclittle, 2014-10-27 21:30:08]

The CQ bit was checked by sclittle@chromium.org

[commit-bot: I haz the power, 2014-10-27 21:31:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/664483004/1

[commit-bot: I haz the power, 2014-10-27 23:09:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-27 23:09:44]

Patchset 1 (id:??) landed as
https://crrev.com/b904b15f3e24cbcaaec47cc3c9a88c4952ca116c
Cr-Commit-Position: refs/heads/master@{#301470}