ABANDONED: chromeos: Download contacts (work in progress).

chrome/browser/chromeos/contacts/contact_source_observer.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_CHROMEOS_CONTACTS_CONTACT_SOURCE_OBSERVER_H_
+#define CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_SOURCE_OBSERVER_H_
+
+#include "base/basictypes.h"
+
+namespace contacts {
+
+class ContactSource;
+
+// Interface for observing changes to a ContactSource.
+class ContactSourceObserver {
+ public:
+  ContactSourceObserver() {}
+  virtual ~ContactSourceObserver() {}
+
+  // Called when the contacts stored within a ContactSource are updated.
+  virtual void OnContactsUpdated(ContactSource* source) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ContactSourceObserver);
+};
+
+}  // namespace contacts
+
+#endif  // CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_SOURCE_OBSERVER_H_