Add non-blocking sync code to ProfileSyncService

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"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread.h"
 #include "components/sync_driver/backend_data_type_configurer.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/configure_reason.h"
 #include "sync/internal_api/public/sessions/sync_session_snapshot.h"
+#include "sync/internal_api/public/sync_core_proxy.h"
 #include "sync/internal_api/public/sync_manager.h"
 #include "sync/internal_api/public/sync_manager_factory.h"
 #include "sync/internal_api/public/util/report_unrecoverable_error_function.h"
 #include "sync/internal_api/public/util/unrecoverable_error_handler.h"
 #include "sync/internal_api/public/util/weak_handle.h"
 
 class GURL;
 
 namespace base {
 class MessageLoop;
@@ skipping 122 matching lines @@
       ChangeProcessor* change_processor) = 0;
 
   // Deactivates change processing for the given data type.
   virtual void DeactivateDataType(syncer::ModelType type) = 0;
 
   // Called on |frontend_loop_| to obtain a handle to the UserShare needed for
   // creating transactions.  Should not be called before we signal
   // initialization is complete with OnBackendInitialized().
   virtual syncer::UserShare* GetUserShare() const = 0;
 
+  // Called on |frontend_loop_| to obtain a handle to the SyncCore needed by
+  // the non-blocking sync types to communicate with the server.
+  virtual syncer::SyncCoreProxy GetSyncCoreProxy() = 0;
+
   // Called from any thread to obtain current status information in detailed or
   // summarized form.
   virtual Status GetDetailedStatus() = 0;
   virtual syncer::sessions::SyncSessionSnapshot
       GetLastSessionSnapshot() const = 0;
 
   // Determines if the underlying sync engine has made any local changes to
   // items that have not yet been synced with the server.
   // ONLY CALL THIS IF OnInitializationComplete was called!
   virtual bool HasUnsyncedItems() const = 0;
@@ skipping 31 matching lines @@
   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_