Revert order of EXTENSION_LOADED and EXTENSION_INSTALLED notifications back to

Revert order of EXTENSION_LOADED and EXTENSION_INSTALLED notifications back to
the original way (installed then loaded).

I originally switched the order so I could dispatch the onInstalled event, but
doing so in a PostTask is a better solution to that.

BUG=no
TEST=no


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=134653

[Aaron Boodman, 2012-04-30 21:00:06]

awesome, lgtm

[commit-bot: I haz the power, 2012-04-30 21:03:08]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mpcomplete@chromium.org/10274013/1

[commit-bot: I haz the power, 2012-04-30 21:28:06]

Try job failure for 10274013-1 (retry) on linux_chromeos for step "compile"
(clobber build).
It's a second try, previously, step "compile" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_chro...

[commit-bot: I haz the power, 2012-04-30 23:37:15]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mpcomplete@chromium.org/10274013/10004

[commit-bot: I haz the power, 2012-05-01 01:03:25]

Change committed as 134653