Remove requirement for an error message for showing Intents

Remove requirement for an error message for showing Intents

There are situations where we really don't mind if firing a
[Pending]Intent doesn't return to Chrome.  In these cases,
alerting the user about Chrome dying is unnecessary.

BUG=453170
Committed: https://crrev.com/1bb67aa78837a6ed8501b6d1f0081e8989c652e7
Cr-Commit-Position: refs/heads/master@{#315178}

[gone, 2015-02-07 00:52:55]

dfalcantara@chromium.org changed reviewers:
+ dtrainor@chromium.org

[David Trainor- moved to gerrit, 2015-02-07 00:59:53]

lgtm

[gone, 2015-02-07 02:15:29]

The CQ bit was checked by dfalcantara@chromium.org

[commit-bot: I haz the power, 2015-02-07 02:16:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/907593002/1

[commit-bot: I haz the power, 2015-02-07 03:55:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-07 03:56:03]

Patchset 1 (id:??) landed as
https://crrev.com/1bb67aa78837a6ed8501b6d1f0081e8989c652e7
Cr-Commit-Position: refs/heads/master@{#315178}