Hook up Autofill Backend interface to SyncableServices

components/autofill/browser/webdata/autofill_backend_delegate.h

+// Copyright 2013 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 COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_BACKEND_DELEGATE_H_
+#define COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_BACKEND_DELEGATE_H_
+
+#include "base/basictypes.h"
+#include "base/callback_forward.h"
+#include "base/compiler_specific.h"
+#include "base/memory/weak_ptr.h"
+
+class WebDatabase;
+
+namespace autofill {
+
+class AutofillWebDataBackend;
+class AutofillWebDataServiceObserverOnDBThread;
+class AutofillWebDataService;
+
+// Delegate class for doing Autofill work directly on the DB thread (used by
+// Sync, mostly), without fully exposing the AutofillWebDataBackend to clients.
+class AutofillBackendDelegate {
+ public:
+  AutofillBackendDelegate(
+      base::WeakPtr<WebDatabase> db,
+      base::WeakPtr<AutofillWebDataBackend> autofill_backend);
+
+  ~AutofillBackendDelegate();
+
+  WebDatabase* GetDatabase();
+
+  // Add an observer to |autofill_backend_|.
+  void AddObserver(AutofillWebDataServiceObserverOnDBThread* observer);
+
+  // Remove an observer from |autofill_backend_|.
+  void RemoveObserver(AutofillWebDataServiceObserverOnDBThread* observer);
+
+  // Remove expired elements from |web_database_| and commit if needed.
+  void RemoveExpiredFormElements();
+
+  // Notifies listeners on the UI thread that multiple changes have been made to
+  // to Autofill records of the database.
+  // NOTE: This method is intended to be called from the DB thread.  It
+  // it asynchronously notifies listeners on the UI thread.
+  // |web_data_service| may be NULL for testing purposes.
+  void NotifyOfMultipleAutofillChanges(
+      AutofillWebDataService* web_data_service);
+
+ private:
+  base::WeakPtr<WebDatabase> web_database_;
+  base::WeakPtr<AutofillWebDataBackend> autofill_backend_;
+
+};
+
+} // autofill
+
+#endif //COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_BACKEND_DELEGATE_H_