From the enter-passphrase screen in sync setup, canceling should only disable...

chrome/browser/sync/profile_sync_service.h

 // Copyright (c) 2010 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_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 453 matching lines @@
   //
   // TODO(akalin): Figure out a better way to do this.  Ideally, we'd
   // construct the backend outside this class and pass it in to the
   // contructor or Initialize().
   virtual void CreateBackend();
 
   const browser_sync::DataTypeController::TypeMap& data_type_controllers() {
     return data_type_controllers_;
   }
 
+  // Helper method for managing encryption UI.
+  bool IsEncryptedDatatypeEnabled() const;
+
   // The wizard will try to read the auth state out of the profile sync
   // service using this member. Captcha and error state are reflected.
   GoogleServiceAuthError last_auth_error_;
 
   // Our asynchronous backend to communicate with sync components living on
   // other threads.
   scoped_ptr<browser_sync::SyncBackendHost> backend_;
 
   // Cache of the last name the client attempted to authenticate.
   std::string last_attempted_user_email_;
@@ skipping 138 matching lines @@
   // and is necessary because the nudge sync framework can drop nudges for
   // a wide variety of sync-related conditions (throttling, connections issues,
   // syncer paused, etc.).  It can only be removed correctly when the framework
   // is reworked to allow one-shot commands like clearing server data.
   base::OneShotTimer<ProfileSyncService> clear_server_data_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_