Add another test for importing a bad EC key into WebCrypto.

Add another test for importing a bad EC key into WebCrypto.

The test is a private key for P-256, using PKCS8 as the input format. The private key is exactly equal to order (max valid private key is n-1).

BUG=445679
Committed: https://crrev.com/df648d28c1db235526abaeda0ee649fce7fdbae0
Cr-Commit-Position: refs/heads/master@{#310181}

[eroman, 2015-01-06 20:09:33]

eroman@chromium.org changed reviewers:
+ davidben@chromium.org

[davidben, 2015-01-06 20:14:31]

lgtm. Confirmed by looking at the input in an ASN.1 decoder.

[eroman, 2015-01-06 21:15:47]

The CQ bit was checked by eroman@chromium.org

[commit-bot: I haz the power, 2015-01-06 21:17:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/838573003/1

[commit-bot: I haz the power, 2015-01-06 22:58:23]

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

[commit-bot: I haz the power, 2015-01-06 22:58:24]

Try jobs failed on following builders:
  mac_chromium_rel_ng on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[eroman, 2015-01-06 23:07:37]

The CQ bit was checked by eroman@chromium.org

[commit-bot: I haz the power, 2015-01-06 23:09:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/838573003/20001

[commit-bot: I haz the power, 2015-01-07 00:20:23]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-07 00:21:41]

Patchset 2 (id:??) landed as
https://crrev.com/df648d28c1db235526abaeda0ee649fce7fdbae0
Cr-Commit-Position: refs/heads/master@{#310181}