Start a market Intent with Intent.FLAG_ACTIVITY_NEW_TASK

Start a market Intent with Intent.FLAG_ACTIVITY_NEW_TASK

In document mode, the current task could be removed after a market Intent
is started.
So, we should start it in a new task.

BUG=487295
Committed: https://crrev.com/8f86e9071d339071cb9cf7256c90fd22e52a2911
Cr-Commit-Position: refs/heads/master@{#330836}

[Jaekyun Seok (inactive), 2015-05-20 22:43:52]

jaekyun@chromium.org changed reviewers:
+ mariakhomenko@chromium.org, tedchoc@chromium.org

[Jaekyun Seok (inactive), 2015-05-20 22:43:52]

mariakhomenko@ and tedchoc@, please review this CL.

[Maria, 2015-05-20 22:53:08]

lgtm

[Jaekyun Seok (inactive), 2015-05-20 22:53:59]

The CQ bit was checked by jaekyun@chromium.org

[commit-bot: I haz the power, 2015-05-20 22:54:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149863003/1

[commit-bot: I haz the power, 2015-05-20 23:30:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-20 23:32:08]

Patchset 1 (id:??) landed as
https://crrev.com/8f86e9071d339071cb9cf7256c90fd22e52a2911
Cr-Commit-Position: refs/heads/master@{#330836}