Revert r155813 "Reland - cros: Add chat icon to app list"

Revert r155813 "Reland - cros: Add chat icon to app list"

r155813 turns out to be no longer needed and causing failures with
ntp ordering change.
 
BUG=152237, 149750
TEST=Verify no DCHECK failure or crash when showing app list with gtalk extension installed and gtalk extension does not show in app list.

R=sky@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=158760

[xiyuan, 2012-09-25 20:48:00]

Putting the fix in ExtensionAppItem where we already have special case for talk
extension since these hacks would probably go away in the future.

Otherwise, the proper fix would be make Extension::ShouldDisplayInLauncher()
returns true for talk extension.

[xiyuan, 2012-09-25 21:19:15]

Ignore this. Checked with Josh and we could clean up the hacks now.

Will update the CL and ping back.

[xiyuan, 2012-09-25 22:46:37]

CL is updated to remove the talk extension hack that is no longer needed.

Please take a look. Thanks.

[asargent_no_longer_on_chrome, 2012-09-25 22:59:59]

chrome/common/extensions/* LGTM

[sky, 2012-09-25 23:40:39]

LGTM

[commit-bot: I haz the power, 2012-09-26 00:59:00]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/xiyuan@chromium.org/10979020/2002

[commit-bot: I haz the power, 2012-09-26 06:56:38]

Change committed as 158760