Add error handler for license request.

Fail tests if the license request XHR fails due to a network error.

Committed: https://crrev.com/a99358ea74e7036e56a3285872f4b2fe718fc36d
Cr-Commit-Position: refs/heads/master@{#297509}

[sandersd (OOO until July 31), 2014-09-30 20:20:06]

sandersd@chromium.org changed reviewers:
+ ddorwin@chromium.org

[ddorwin, 2014-09-30 20:43:44]

https://codereview.chromium.org/616933003/diff/1/media/test/data/eme_player_j...
File media/test/data/eme_player_js/utils.js (right):

https://codereview.chromium.org/616933003/diff/1/media/test/data/eme_player_j...
media/test/data/eme_player_js/utils.js:230: Utils.failTest('FAILED: Unable to
request license.');
How about:
'FAILED: License request XHR failed.'

That's more meaningful to the reader.

Is there something in |e|, even in some cases, that we can print to provide more
context?
Also, we could print the serverURL and maybe other values.

[sandersd (OOO until July 31), 2014-09-30 20:56:35]

https://codereview.chromium.org/616933003/diff/1/media/test/data/eme_player_j...
File media/test/data/eme_player_js/utils.js (right):

https://codereview.chromium.org/616933003/diff/1/media/test/data/eme_player_j...
media/test/data/eme_player_js/utils.js:230: Utils.failTest('FAILED: Unable to
request license.');
On 2014/09/30 20:43:44, ddorwin wrote:
> How about:
> 'FAILED: License request XHR failed.'
> 
> That's more meaningful to the reader.
> 
> Is there something in |e|, even in some cases, that we can print to provide
more
> context?
> Also, we could print the serverURL and maybe other values.

Done.

The server URL is logged at the start of the attempt.

All the other values are empty, but I've added logging of statusText anyway.

[ddorwin, 2014-09-30 21:07:13]

lgtm

[sandersd (OOO until July 31), 2014-09-30 21:08:58]

The CQ bit was checked by sandersd@chromium.org

[commit-bot: I haz the power, 2014-09-30 21:09:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/616933003/20001

[commit-bot: I haz the power, 2014-09-30 21:46:00]

Committed patchset #2 (id:20001) as 74f030a29ab769a6da87b377fb49fc0072818833

[commit-bot: I haz the power, 2014-09-30 21:46:41]

Patchset 2 (id:??) landed as
https://crrev.com/a99358ea74e7036e56a3285872f4b2fe718fc36d
Cr-Commit-Position: refs/heads/master@{#297509}