[Sync] Add support for enabling session sync remotely.

chrome/browser/sync/profile_sync_service_harness.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_BROWSER_SYNC_PROFILE_SYNC_SERVICE_HARNESS_H_
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_HARNESS_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 139 matching lines @@
 
   // Wait until |type| is encrypted or we time out.
   // PostCondition:
   //   returns: True if |type| is currently encrypted and we are fully synced.
   //            False if we timed out.
   bool WaitForTypeEncryption(syncable::ModelType type);
 
   // Check if |type| is encrypted.
   bool IsTypeEncrypted(syncable::ModelType type);
 
+  // Check if |type| is registered.
+  bool IsTypeRegistered(syncable::ModelType types);
+
+  // Check if |type| is being synced.
+  bool IsTypePreferred(syncable::ModelType type);
+
  private:
   friend class StateChangeTimeoutEvent;
 
   enum WaitState {
     // The sync client has just been initialized.
     INITIAL_WAIT_STATE = 0,
 
     // The sync client awaits the OnBackendInitialized() callback.
     WAITING_FOR_ON_BACKEND_INITIALIZED,
 
@@ skipping 109 matching lines @@
   const std::string profile_debug_name_;
 
   // Keeps track of the number of attempts at exponential backoff and its
   // related bookkeeping information for verification.
   browser_sync::RetryVerifier retry_verifier_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncServiceHarness);
 };
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_HARNESS_H_