sync: Make nudge + config jobs reliable in SyncerThread2

chrome/browser/sync/glue/sync_backend_host.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_GLUE_SYNC_BACKEND_HOST_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 308 matching lines @@
       std::string lsid;
       bool delete_sync_data_folder;
       std::string restored_key_for_bootstrapping;
       bool setup_for_test_mode;
     };
 
     // Called on |frontend_loop_|.
     void CreateSyncNotifier(const scoped_refptr<net::URLRequestContextGetter>&
         request_context_getter);
 
-
     // Note:
     //
     // The Do* methods are the various entry points from our SyncBackendHost.
     // It calls us on a dedicated thread to actually perform synchronous
     // (and potentially blocking) syncapi operations.
     //
     // Called on the SyncBackendHost core_thread_ to perform initialization
     // of the syncapi on behalf of SyncBackendHost::Initialize.
     void DoInitialize(const DoInitializeOptions& options);
 
@@ skipping 55 matching lines @@
     void DeleteSyncDataFolder();
 
     void ConnectChildJsEventRouter();
 
     void DisconnectChildJsEventRouter();
 
     void DoProcessMessage(
         const std::string& name, const JsArgList& args,
         const JsEventHandler* sender);
 
+    void DoStartConfigurationMode();
+
     // A callback from the SyncerThread when it is safe to continue config.
     void FinishConfigureDataTypes();
 
 #if defined(UNIT_TEST)
     // Special form of initialization that does not try and authenticate the
     // last known user (since it will fail in test mode) and does some extra
     // setup to nudge the syncapi into a usable state.
     void DoInitializeForTest(const std::wstring& test_user,
                              sync_api::HttpPostProviderFactory* factory,
                              bool delete_sync_data_folder) {
@@ skipping 246 matching lines @@
 
   // Whether we've processed the initialization complete callback.
   bool syncapi_initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHost);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_