Move small c/b/extensions classes into extensions namespace no.1

Move small c/b/extensions classes into extensions namespace no.1

Since these classes are small, they can be all be moved in one cl without it becoming overly large.

This one moves:
- AppShortcutManager
- AutoUpdateInterceptor
- ConvertWebApp
- ExtensionActivityLog (now extensions::ActivityLog)

BUG=117261
TBR=jam@chromium.org, willchan@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=152159

[Devlin, 2012-08-09 18:46:17]

Please review when you have a chance:
mpcomplete: c/b/extensions/
csilv: c/b/ui/webui/, c/b/resources/extensions/

Thanks in advance.

[csilv, 2012-08-09 18:54:17]

lgtm

[Matt Perry, 2012-08-15 20:27:00]

lgtm

[commit-bot: I haz the power, 2012-08-15 22:12:00]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rdevlin.cronin@chromium.org/10824198/7001

[commit-bot: I haz the power, 2012-08-15 22:53:37]

Try job failure for 10824198-7001 (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, 2012-08-16 22:52:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rdevlin.cronin@chromium.org/10824198/7001

[commit-bot: I haz the power, 2012-08-17 00:19:13]

Try job failure for 10824198-7001 (retry) on linux_rel for step
"interactive_ui_tests".
It's a second try, previously, step "interactive_ui_tests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_rel&...

[commit-bot: I haz the power, 2012-08-17 18:17:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rdevlin.cronin@chromium.org/10824198/2010

[commit-bot: I haz the power, 2012-08-17 22:29:40]

Change committed as 152159