Don't add the app activity as it's already added.

Don't add the app activity as it's already added.
Looks like  I made an error when I split the CL. I'll add a test in a separate CL.

BUG=None
TBR=mukai@chromium.org

Committed: https://crrev.com/0b0be35de4832c5aebda4a084baa6be20ba9f17f
Cr-Commit-Position: refs/heads/master@{#296491}

[oshima, 2014-09-24 18:53:16]

oshima@chromium.org changed reviewers:
+ mukai@chromium.org

[oshima, 2014-09-24 18:53:37]

tbr'ing as it's causing crash. I'll work in a test in a separate CL.

[oshima, 2014-09-24 18:53:44]

The CQ bit was checked by oshima@chromium.org

[commit-bot: I haz the power, 2014-09-24 18:54:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/602843002/1

[commit-bot: I haz the power, 2014-09-24 19:36:26]

Committed patchset #1 (id:1) as 2da725a544d54a727ea9cbdc9934a13f167762c7

[commit-bot: I haz the power, 2014-09-24 19:37:13]

Patchset 1 (id:??) landed as
https://crrev.com/0b0be35de4832c5aebda4a084baa6be20ba9f17f
Cr-Commit-Position: refs/heads/master@{#296491}

[Jun Mukai, 2014-09-24 20:44:58]

lgtm