[NTP Snippets] Fix crash when clicking on a native-page suggestion

[NTP Snippets] Fix crash when clicking on a native-page suggestion

Opening a native page (e.g. Bookmarks, Recent Tabs) causes the NewTabPage
instance to be destroyed immediately, so do that *after* calling tracking
methods etc.

BUG=640543
Committed: https://crrev.com/53f0240ae041bcb9e28d82b2a8b99121afeff388
Cr-Commit-Position: refs/heads/master@{#414071}

[Marc Treib, 2016-08-24 14:20:49]

The CQ bit was checked by treib@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-24 14:21:02]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Marc Treib, 2016-08-24 14:21:05]

treib@chromium.org changed reviewers:
+ bauerb@chromium.org

[Marc Treib, 2016-08-24 14:21:05]

PTAL!

[Bernhard Bauer, 2016-08-24 14:30:09]

lgtm

[Marc Treib, 2016-08-24 14:36:37]

The CQ bit was unchecked by treib@chromium.org

[Marc Treib, 2016-08-24 14:36:38]

The CQ bit was checked by treib@chromium.org

[commit-bot: I haz the power, 2016-08-24 14:36:40]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-24 14:58:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-24 15:00:16]

Description was changed from

==========
[NTP Snippets] Fix crash when clicking on a native-page suggestion

Opening a native page (e.g. Bookmarks, Recent Tabs) causes the NewTabPage
instance to be destroyed immediately, so do that *after* calling tracking
methods etc.

BUG=640543
==========

to

==========
[NTP Snippets] Fix crash when clicking on a native-page suggestion

Opening a native page (e.g. Bookmarks, Recent Tabs) causes the NewTabPage
instance to be destroyed immediately, so do that *after* calling tracking
methods etc.

BUG=640543

Committed: https://crrev.com/53f0240ae041bcb9e28d82b2a8b99121afeff388
Cr-Commit-Position: refs/heads/master@{#414071}
==========

[commit-bot: I haz the power, 2016-08-24 15:00:17]

Patchset 1 (id:??) landed as
https://crrev.com/53f0240ae041bcb9e28d82b2a8b99121afeff388
Cr-Commit-Position: refs/heads/master@{#414071}