[refactor] Split wrap-unwrap.html into smaller files, and directly check the error result.

[refactor] Split wrap-unwrap.html into smaller files, and directly check the error result.

wrap-unwrap.html becomes these files:

 * wrapKey-unextractable.html
 * wrapKey-lacks-usage.html
 * wrapKey-badParameters.html
 * unwrapKey-lacks-usage.html
 * unwrapKey-badParameters.html

BUG=245025
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170201

[eroman, 2014-03-27 05:09:27]

Almost done with these pedantic refactors, just generateKey left now!

(These are precursors to changing the error handling, as well as adding a bunch
more per-algorithm tests).

Thanks

[abarth-chromium, 2014-03-27 20:05:23]

lgtm

[commit-bot: I haz the power, 2014-03-27 20:05:25]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eroman@chromium.org/214263002/20001

[commit-bot: I haz the power, 2014-03-27 20:13:56]

Change committed as 170201