[refactor] Split up the layout test sign-verify.html into smaller files.

[refactor] Split up the layout test sign-verify.html into smaller files.

Becomes:
 * hmac-sign-verify.html
 * sign-verify-badParameters.html

Motivation: I am splitting out per-algorithm tests so the tests are more readable.

Also changing how the error expectations are tested to simplify an upcoming change where the result is no longer just "null".

BUG=245025
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170138

[eroman, 2014-03-27 03:35:27]

No rush at all on this, just wanted to ping in case it got lost in inbox :)

[abarth-chromium, 2014-03-27 04:35:25]

LGTM

Thanks for the ping.  It did get lost somehow.

[eroman, 2014-03-27 05:10:06]

The CQ bit was checked by eroman@chromium.org

[commit-bot: I haz the power, 2014-03-27 05:10:15]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eroman@chromium.org/199663006/120001

[commit-bot: I haz the power, 2014-03-27 05:21:21]

Change committed as 170138