[webcrypto] Remove code conditional on !defined(WEBCRYPTO_HAS_KEY_ALGORITHM).

[webcrypto] Remove code conditional on !defined(WEBCRYPTO_HAS_KEY_ALGORITHM).

This is the sister change to r253463 to remove the old API once the blink changes have rolled into chromium.

BUG=245025
TBR=rsleevi

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=254080

[eroman, 2014-02-26 20:12:58]

This probably won't be ready to land for another 1-2 day 

(need to wait for blink patches to land, and then for blink to roll into
Chromium)

[eroman, 2014-02-27 23:34:26]

The CQ bit was checked by eroman@chromium.org

[commit-bot: I haz the power, 2014-02-27 23:34:57]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eroman@chromium.org/182073002/30001

[Ryan Sleevi, 2014-02-28 00:10:28]

lgtm

[commit-bot: I haz the power, 2014-02-28 01:16:13]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eroman@chromium.org/182073002/30001

[commit-bot: I haz the power, 2014-02-28 10:24:34]

Change committed as 254080