Removed NOTIMPLEMENTED() from Encryptor::EncryptString() and Encryptor::Decry...

Removed NOTIMPLEMENTED() from Encryptor::EncryptString() and Encryptor::DecryptString() in
chrome/browser/password_manager/encryptor_mac.mm, so it does exactly the same thing as on Linux: copies unencrypted text.
BUG=25404
TEST=Filling out Autofill for CC on Mac should not assert.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=44984

[dhollowa, 2010-04-19 22:19:20]

LGTM.

[stuartmorgan, 2010-04-20 00:19:31]

For the reasons explained in http://crbug.com/42038 I think this is moving us in
the wrong direction. It should be impossible to use encryptor on the Mac, and
instead this change makes it seem like a good solution to secure local storage
on the Mac.

[stuartmorgan, 2010-04-20 00:21:53]

(To be clear, I understand that from the comments in the files it seems like a
perfectly reasonable change, I just don't think those comments reflect the
reality of where we should be going.)