When an extension is unloaded, unregister all event listeners, not just the lazy ones.

When an extension is unloaded, unregister all event listeners, not just the lazy ones.

This fixes a problem where event listeners could stick around for a
short time period after an extension is unloaded, causing problems
with the onInstalled event for a new version of an extension.

BUG=449654
Committed: https://crrev.com/1a3586c0467a2e2f3777c060616e787bc9535c19
Cr-Commit-Position: refs/heads/master@{#313556}

[Marijn Kruisselbrink, 2015-01-28 00:09:52]

Patchset #1 (id:1) has been deleted

[Marijn Kruisselbrink, 2015-01-28 00:35:03]

mek@chromium.org changed reviewers:
+ kalman@chromium.org

[Marijn Kruisselbrink, 2015-01-28 00:35:04]

It probably makes sense to add the extension from the bug as testcase somewhere,
although I'm not entirely sure what the best place would be...

[not at google - send to devlin, 2015-01-28 00:35:52]

lgtm

[Marijn Kruisselbrink, 2015-01-28 18:31:43]

The CQ bit was checked by mek@chromium.org

[commit-bot: I haz the power, 2015-01-28 18:32:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/877233002/50001

[commit-bot: I haz the power, 2015-01-28 19:07:15]

Committed patchset #3 (id:50001)

[commit-bot: I haz the power, 2015-01-28 19:08:23]

Patchset 3 (id:??) landed as
https://crrev.com/1a3586c0467a2e2f3777c060616e787bc9535c19
Cr-Commit-Position: refs/heads/master@{#313556}