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chrome/browser/history/url_database_observer.h

+// Copyright (c) 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 CHROME_BROWSER_HISTORY_URL_DATABASE_OBSERVER_H_
+#define CHROME_BROWSER_HISTORY_URL_DATABASE_OBSERVER_H_
+
+namespace history {
+
+class URLRow;
+
+// Observer for the URLDatabase.
+class URLDatabaseObserver {
+ public:
+  URLDatabaseObserver() {};
+
+  // Invoked when url was added to database.
+  virtual void URLAdded(const URLRow& added) = 0;
+
+  // Invoked when url was removed from database.
+  virtual void URLDeleted(const URLRow& removed) = 0;
+
+  // Invoked when url was changed in database.
+  virtual void URLChanged(const URLRow& old,
+                          const URLRow& current) = 0;
+
+ protected:
+  virtual ~URLDatabaseObserver() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(URLDatabaseObserver);
+};
+
+} // history
+
+#endif  // CHROME_BROWSER_HISTORY_URL_DATABASE_OBSERVER_H_