Fix up #ifdefs in crypto/encryptor.h.

Fix up #ifdefs in crypto/encryptor.h.

This was causing scoped_nss_types.h to be incorrectly included in the chimera
build. (No actual consequence. The header is legal in the chimera, it's just
unnecessary.)

BUG=none

Committed: https://crrev.com/591b117f69bab18f9dc8ade07dfa0e30d7c1e00f
Cr-Commit-Position: refs/heads/master@{#342938}

[davidben, 2015-08-11 15:07:40]

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

[Ryan Sleevi, 2015-08-11 23:32:35]

lgtm

[davidben, 2015-08-11 23:33:05]

The CQ bit was checked by davidben@chromium.org

[commit-bot: I haz the power, 2015-08-11 23:33:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1281033003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1281033003/1

[commit-bot: I haz the power, 2015-08-11 23:41:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-11 23:42:36]

Patchset 1 (id:??) landed as
https://crrev.com/591b117f69bab18f9dc8ade07dfa0e30d7c1e00f
Cr-Commit-Position: refs/heads/master@{#342938}