Move JS-related password manager code upstream

ios/web/web_state/js/credential_util.h

Index: ios/web/web_state/js/credential_util.h
diff --git a/ios/web/web_state/js/credential_util.h b/ios/web/web_state/js/credential_util.h
deleted file mode 100644
index 39230dec05c964c07952dc70b17c04c5aca2f4f9..0000000000000000000000000000000000000000
--- a/ios/web/web_state/js/credential_util.h
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_WEB_WEB_STATE_JS_CREDENTIAL_UTIL_H_
-#define IOS_WEB_WEB_STATE_JS_CREDENTIAL_UTIL_H_
-
-namespace base {
-class DictionaryValue;
-}  // namespace base
-
-namespace web {
-
-struct Credential;
-
-// Populates |credential| from |value|, returning true if successful and false
-// otherwise. |value| must contain the following string->string key/value
-// pairs:
-//
-//     "type": one of "PasswordCredential" of "FederatedCredential"
-//     "id": a string (possibly empty)
-//
-// The following pairs are optional:
-//
-//     "name": a string (possibly empty)
-//     "avatarURL": a valid URL as a string
-//
-// If "type" is "PasswordCredential", then |value| must contain
-//
-//     "password" a string (possibly empty)
-//
-// If "type" is "FederatedCredential", then |value| must contain
-//
-//     "federation": a valid URL as a string
-//
-// If passed a |value| that doesn't meet these restrictions, |credential| will
-// not be modified and false will be returned. |credential| must not be null.
-bool DictionaryValueToCredential(const base::DictionaryValue& value,
-                                 Credential* credential);
-
-// Serializes |credential| to |value|.
-void CredentialToDictionaryValue(const Credential& credential,
-                                 base::DictionaryValue* value);
-
-}  // namespace web
-
-#endif  // IOS_WEB_WEB_STATE_JS_CREDENTIAL_UTIL_H_