Take 2 at browser_sync::ExtensionsActivityMonitor....

chrome/browser/sync/engine/process_commit_response_command.h

 // Copyright (c) 2006-2009 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_ENGINE_PROCESS_COMMIT_RESPONSE_COMMAND_H_
 #define CHROME_BROWSER_SYNC_ENGINE_PROCESS_COMMIT_RESPONSE_COMMAND_H_
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "chrome/browser/sync/engine/model_changing_syncer_command.h"
 #include "chrome/browser/sync/engine/syncer_session.h"
 #include "chrome/browser/sync/engine/syncproto.h"
 
 namespace syncable {
 class Id;
 class WriteTransaction;
 class MutableEntry;
 }
 
 namespace browser_sync {
 
 class ProcessCommitResponseCommand : public ModelChangingSyncerCommand {
  public:
 
-  ProcessCommitResponseCommand();
+  explicit ProcessCommitResponseCommand(ExtensionsActivityMonitor* monitor);
   virtual ~ProcessCommitResponseCommand();
 
   virtual void ModelChangingExecuteImpl(SyncerSession* session);
  private:
   CommitResponse::RESPONSE_TYPE ProcessSingleCommitResponse(
       syncable::WriteTransaction* trans,
       const sync_pb::CommitResponse_EntryResponse& pb_server_entry,
       const syncable::Id& pre_commit_id, std::set<syncable::Id>*
       conflicting_new_directory_ids,
       std::set<syncable::Id>* deleted_folders,
       SyncerSession* const session);
 
+  // Actually does the work of execute.
+  void ProcessCommitResponse(SyncerSession* session);
+
   void ProcessSuccessfulCommitResponse(syncable::WriteTransaction* trans,
       const CommitResponse_EntryResponse& server_entry,
       const syncable::Id& pre_commit_id, syncable::MutableEntry* local_entry,
       bool syncing_was_set, std::set<syncable::Id>* deleted_folders,
       SyncerSession* const session);
 
   void PerformCommitTimeNameAside(
       syncable::WriteTransaction* trans,
       const CommitResponse_EntryResponse& server_entry,
       syncable::MutableEntry* local_entry);
 
+  // We may need to update this with records from a commit attempt if the
+  // attempt failed.
+  ExtensionsActivityMonitor* extensions_monitor_;
+
   DISALLOW_COPY_AND_ASSIGN(ProcessCommitResponseCommand);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_PROCESS_COMMIT_RESPONSE_COMMAND_H_