[Sync] Tidy up SyncBackendHost interface.

chrome/common/notification_type.h

 // Copyright (c) 2011 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 CHROME_COMMON_NOTIFICATION_TYPE_H_
 #define CHROME_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 1137 matching lines @@
 
     // A foreign session has been updated.  If a new tab page is open, the
     // foreign session handler needs to update the new tab page's foreign
     // session data.
     FOREIGN_SESSION_UPDATED,
 
     // Foreign sessions has been disabled. New tabs should not display foreign
     // session data.
     FOREIGN_SESSION_DISABLED,
 
-    // The syncer requires a passphrase to decrypt sensitive updates. This
-    // notification is sent when the first sensitive data type is setup by the
-    // user as well as anytime any the passphrase is changed in another synced
-    // client.  The source is the SyncBackendHost wanting a passphrase.  The
-    // details are a boolean: true if the passphrase is required for decryption,
-    // false if only required for encryption.
-    SYNC_PASSPHRASE_REQUIRED,
-
-    // Sent when the passphrase provided by the user is accepted. After this
-    // notification is sent, updates to sensitive nodes are encrypted using the
-    // accepted passphrase.  The source is the SyncBackendHost that accepted
-    // the passphrase.  No details.
-    SYNC_PASSPHRASE_ACCEPTED,
-
     // Sent when the set of data types that should be synced has been modified
     // externally (eg. by the dom_ui options screen).
     // The source is the Profile, there are no details.
     SYNC_DATA_TYPES_UPDATED,
 
     // Cookies -----------------------------------------------------------------
 
     // Sent when a cookie changes. The source is a Profile object, the details
     // are a ChromeCookieDetails object.
     COOKIE_CHANGED,
@@ skipping 151 matching lines @@
 };
 
 inline bool operator==(NotificationType::Type a, NotificationType b) {
   return a == b.value;
 }
 inline bool operator!=(NotificationType::Type a, NotificationType b) {
   return a != b.value;
 }
 
 #endif  // CHROME_COMMON_NOTIFICATION_TYPE_H_