sync: Buffer Protocol Events for about:sync page

sync/internal_api/sync_manager_impl.h

Index: sync/internal_api/sync_manager_impl.h
diff --git a/sync/internal_api/sync_manager_impl.h b/sync/internal_api/sync_manager_impl.h
index 71890268150dad5a1a75af71b84325a79122567a..ebdb4a8b7583ef9245fe09bdd82e6b9ce09e5558 100644
--- a/sync/internal_api/sync_manager_impl.h
+++ b/sync/internal_api/sync_manager_impl.h
@@ -19,6 +19,7 @@
 #include "sync/internal_api/js_mutation_event_observer.h"
 #include "sync/internal_api/js_sync_encryption_handler_observer.h"
 #include "sync/internal_api/js_sync_manager_observer.h"
+#include "sync/internal_api/protocol_event_buffer.h"
 #include "sync/internal_api/public/sync_manager.h"
 #include "sync/internal_api/public/user_share.h"
 #include "sync/internal_api/sync_encryption_handler_impl.h"
@@ -114,6 +115,8 @@ class SYNC_EXPORT_PRIVATE SyncManagerImpl :
   virtual bool ReceivedExperiment(Experiments* experiments) OVERRIDE;
   virtual bool HasUnsyncedItems() OVERRIDE;
   virtual SyncEncryptionHandler* GetEncryptionHandler() OVERRIDE;
+  virtual ScopedVector<syncer::ProtocolEvent>
+      GetBufferedProtocolEvents() OVERRIDE;
 
   // SyncEncryptionHandler::Observer implementation.
   virtual void OnPassphraseRequired(
@@ -354,6 +357,7 @@ class SYNC_EXPORT_PRIVATE SyncManagerImpl :
   // This is for keeping track of client events to send to the server.
   DebugInfoEventListener debug_info_event_listener_;
 
+  ProtocolEventBuffer protocol_event_buffer_;
   TrafficRecorder traffic_recorder_;
 
   Encryptor* encryptor_;