Implemented completion pings for component updates.

chrome/browser/component_updater/component_updater_service_observer.h

Index: chrome/browser/component_updater/component_updater_service_observer.h
diff --git a/chrome/browser/component_updater/component_updater_service_observer.h b/chrome/browser/component_updater/component_updater_service_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..ccc8e75734f58019e89df05feaf423016e686c1d
--- /dev/null
+++ b/chrome/browser/component_updater/component_updater_service_observer.h
@@ -0,0 +1,27 @@
+// 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_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_OBSERVER_H_
+#define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_OBSERVER_H_
+
+#include "base/basictypes.h"
+
+struct CrxUpdateItem;
+
+namespace component_updater {
+
+// Provides an event sink for the ComponentUpdaterService.
+class ComponentUpdaterServiceObserver {
+ public:
+  virtual ~ComponentUpdaterServiceObserver() {}
+
+  // The update has completed, with success or with an error. The |item| object
+  // contains the state of the update at the completion time.
+  virtual void OnUpdateComplete(const CrxUpdateItem* item) = 0;
+};
+
+}  // namespace component_updater
+
+#endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_OBSERVER_H_
+