Add logic to flip Nigori bit to instruct other clients to sync tabs.

chrome/browser/sync/internal_api/sync_manager.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_INTERNAL_API_SYNC_MANAGER_H_
 #define CHROME_BROWSER_SYNC_INTERNAL_API_SYNC_MANAGER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 416 matching lines @@
   // Prerequisite for calling this is that OnInitializationComplete has been
   // called.
   bool InitialSyncEndedForAllEnabledTypes();
 
   // Update tokens that we're using in Sync. Email must stay the same.
   void UpdateCredentials(const SyncCredentials& credentials);
 
   // Called when the user disables or enables a sync type.
   void UpdateEnabledTypes();
 
+  // Conditionally sets the flag in the Nigori node which instructs other
+  // clients to start syncing tabs.
+  void MaybeSetSyncTabsInNigoriNode(const syncable::ModelTypeSet enabled_types);
+
   // Put the syncer in normal mode ready to perform nudges and polls.
   void StartSyncingNormally();
 
   // Attempt to set the passphrase. If the passphrase is valid,
   // OnPassphraseAccepted will be fired to notify the ProfileSyncService and the
   // syncer will be nudged so that any update that was waiting for this
   // passphrase gets applied as soon as possible.
   // If the passphrase in invalid, OnPassphraseRequired will be fired.
   // Calling this metdod again is the appropriate course of action to "retry"
   // with a new passphrase.
@@ skipping 97 matching lines @@
 };
 
 bool InitialSyncEndedForTypes(syncable::ModelTypeSet types, UserShare* share);
 
 // Returns the string representation of a PassphraseRequiredReason value.
 std::string PassphraseRequiredReasonToString(PassphraseRequiredReason reason);
 
 } // namespace sync_api
 
 #endif  // CHROME_BROWSER_SYNC_INTERNAL_API_SYNC_MANAGER_H_