Adding sync support for Passwords

chrome/browser/sync/glue/password_change_processor.h

+// Copyright (c) 2010 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_PASSWORD_CHANGE_PROCESSOR_H_
+#define CHROME_BROWSER_SYNC_GLUE_PASSWORD_CHANGE_PROCESSOR_H_
+
+#include "chrome/browser/sync/glue/change_processor.h"
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "chrome/browser/sync/glue/sync_backend_host.h"
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/notification_type.h"
+
+class PasswordStore;
+class MessageLoop;
+class NotificationService;
+
+namespace browser_sync {
+
+class PasswordModelAssociator;
+class UnrecoverableErrorHandler;
+
+// This class is responsible for taking changes from the password backend and
+// applying them to the sync_api 'syncable' model, and vice versa. All
+// operations and use of this class are from the DB thread on Windows and Linux,
+// or the password thread on Mac.
+class PasswordChangeProcessor : public ChangeProcessor,
+                                public NotificationObserver {
+ public:
+  PasswordChangeProcessor(PasswordModelAssociator* model_associator,
+                          PasswordStore* password_store,
+                          UnrecoverableErrorHandler* error_handler);
+  virtual ~PasswordChangeProcessor();
+
+  // NotificationObserver implementation.
+  // Passwords -> sync_api model change application.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  // sync_api model -> WebDataService change application.
+  virtual void ApplyChangesFromSyncModel(
+      const sync_api::BaseTransaction* trans,
+      const sync_api::SyncManager::ChangeRecord* changes,
+      int change_count);
+
+ protected:
+  virtual void StartImpl(Profile* profile);
+  virtual void StopImpl();
+
+ private:
+  void StartObserving();
+  void StopObserving();
+
+  // The two models should be associated according to this ModelAssociator.
+  PasswordModelAssociator* model_associator_;
+
+  // The model we are processing changes from.  This is owned by the
+  // WebDataService which is kept alive by our data type controller
+  // holding a reference.
+  PasswordStore* password_store_;
+
+  NotificationRegistrar notification_registrar_;
+
+  bool observing_;
+
+  MessageLoop* expected_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(PasswordChangeProcessor);
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_PASSWORD_CHANGE_PROCESSOR_H_