Move credential_manager_types.h to components/password_manager/core.

Move credential_manager_types.h to components/password_manager/core.

This makes it possible to use the types it contains in non-Blink
embedders such as iOS. The blink::WebCredential constructor of
CredentialInfo is now a factory function that stayed in content/.

BUG=470815
TBR=jochen

Committed: https://crrev.com/11bdc33e169de972479f1e17e5165776133c04d7
Cr-Commit-Position: refs/heads/master@{#322376}

[dconnelly, 2015-03-26 10:44:28]

dconnelly@chromium.org changed reviewers:
+ jochen@chromium.org, mkwst@chromium.org

[dconnelly, 2015-03-26 10:44:29]

+mkwst to review
+jochen for OWNERS approval of mass-rename

[Mike West, 2015-03-26 10:51:14]

LGTM, thanks for factoring this out into a platform-agnostic file.

[dconnelly, 2015-03-26 14:00:04]

The CQ bit was checked by dconnelly@chromium.org

[commit-bot: I haz the power, 2015-03-26 14:00:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1031253003/1

[commit-bot: I haz the power, 2015-03-26 14:04:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-26 14:05:51]

Patchset 1 (id:??) landed as
https://crrev.com/11bdc33e169de972479f1e17e5165776133c04d7
Cr-Commit-Position: refs/heads/master@{#322376}