Added new DriveNotificationObserver interface which all observers of Google Drive invalidations sho…

chrome/browser/google_apis/drive_notification_observer.h

Index: chrome/browser/google_apis/drive_notification_observer.h
diff --git a/chrome/browser/google_apis/drive_notification_observer.h b/chrome/browser/google_apis/drive_notification_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..719abfeaacb3477455ab06cfdb83e10f7bf00c84
--- /dev/null
+++ b/chrome/browser/google_apis/drive_notification_observer.h
@@ -0,0 +1,26 @@
+// 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_GOOGLE_APIS_DRIVE_NOTIFICATION_OBSERVER_H_
+#define CHROME_BROWSER_GOOGLE_APIS_DRIVE_NOTIFICATION_OBSERVER_H_
+

[tzik, 2013/04/09 08:52:30]

#include "base/basictypes.h" ?

[calvinlo, 2013/04/09 08:58:39]

Done.

+namespace google_apis {
+
+// Interface for classes which need to know when to check Google Drive for
+// updates.
+class DriveNotificationObserver {
+ public:
+  DriveNotificationObserver() {}
+  virtual ~DriveNotificationObserver() {}
+
+  // Called when an observer should check Google Drive for updates.
+  virtual void CheckForUpdates() = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DriveNotificationObserver);
+};
+
+}  // namespace google_apis
+
+#endif  // CHROME_BROWSER_GOOGLE_APIS_DRIVE_NOTIFICATION_OBSERVER_H_