Crash if UTS46 data doesn't load at startup

Crash if UTS46 data doesn't load at startup

This check should not fail in Chrome; if loads were failing, we would see crashes all over Chrome when the data was later accessed. In CrNet the data is shipped separately so loads might fail, in which case it is better to crash now rather than when attempting to navigate to a unicode URL.

BUG=None

Committed: https://crrev.com/c9547bec4f1bd1072083163a4a106ab5ffea62c1
Cr-Commit-Position: refs/heads/master@{#335958}

[Elly Fong-Jones, 2015-06-24 15:05:49]

ellyjones@chromium.org changed reviewers:
+ jayjang@chromium.org

[Elly Fong-Jones, 2015-06-24 15:06:16]

jungshik: PTAL?

[jungshik at Google, 2015-06-24 15:30:21]

On 2015/06/24 15:06:16, Elly Jones wrote:
> jungshik: PTAL?

Lgtm. 

The cl description is a bit off. 

The ICU data of which uts46 data is a part is loaded at startup in chrome as
well, but it should be always loaded. Otherwise, there would have been a lot of
crashes recorded in other places as well as where null pointer assigned here is
referenced later. So adding CHECK here
should not result in any new crash.

[Elly Fong-Jones, 2015-06-24 16:42:33]

The CQ bit was checked by ellyjones@chromium.org

[commit-bot: I haz the power, 2015-06-24 16:44:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1210523003/1

[commit-bot: I haz the power, 2015-06-24 16:51:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-24 16:51:06]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Elly Fong-Jones, 2015-06-24 17:35:34]

ellyjones@chromium.org changed reviewers:
+ brettw@chromium.org

[brettw, 2015-06-24 17:37:31]

lgtm

[Elly Fong-Jones, 2015-06-24 17:40:45]

The CQ bit was checked by ellyjones@chromium.org

[commit-bot: I haz the power, 2015-06-24 17:44:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1210523003/1

[commit-bot: I haz the power, 2015-06-24 18:38:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-24 18:39:12]

Patchset 1 (id:??) landed as
https://crrev.com/c9547bec4f1bd1072083163a4a106ab5ffea62c1
Cr-Commit-Position: refs/heads/master@{#335958}