sync: Buffer Protocol Events for about:sync page

chrome/browser/sync/glue/sync_backend_host.h

 // Copyright (c) 2012 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_GLUE_SYNC_BACKEND_HOST_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 174 matching lines @@
   // using a token previously received.
   virtual bool IsCryptographerReady(
       const syncer::BaseTransaction* trans) const = 0;
 
   virtual void GetModelSafeRoutingInfo(
       syncer::ModelSafeRoutingInfo* out) const = 0;
 
   // Fetches the DeviceInfo tracker.
   virtual SyncedDeviceTracker* GetSyncedDeviceTracker() const = 0;
 
-  // Sets whether or not the frontend will be notified of network events.
-  virtual void SetForwardProtocolEvents(bool forward) = 0;
+  // Requests that the backend forward to the fronent any protocol events in
+  // its buffer and begin forwarding automatically from now on.  Repeated calls
+  // to this function may result in the same events being emitted several
+  // times.
+  virtual void RequestBufferedProtocolEventsAndEnableForwarding() = 0;
+
+  // Disables protocol event forwarding.
+  virtual void DisableProtocolEventForwarding() = 0;
 
   virtual base::MessageLoop* GetSyncLoopForTesting() = 0;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHost);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_