Change NotifyAppList*() functions into observers on a ProfileKeyedService.

chrome/browser/extensions/install_tracker_factory.h

+// Copyright 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_EXTENSIONS_INSTALL_TRACKER_FACTORY_H_
+#define CHROME_BROWSER_EXTENSIONS_INSTALL_TRACKER_FACTORY_H_
+
+#include "chrome/browser/profiles/profile_keyed_service_factory.h"
+
+template <typename T> struct DefaultSingletonTraits;
+
+class Profile;
+
+namespace extensions {
+
+class InstallTracker;
+
+class InstallTrackerFactory : public ProfileKeyedServiceFactory {
+ public:
+  static InstallTracker* GetForProfile(Profile* profile);
+  static InstallTrackerFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<InstallTrackerFactory>;
+
+  InstallTrackerFactory();
+  virtual ~InstallTrackerFactory();
+
+  // ProfileKeyedServiceFactory overrides:
+  virtual ProfileKeyedService* BuildServiceInstanceFor(
+      Profile* profile) const OVERRIDE;
+
+  virtual bool ServiceRedirectedInIncognito() const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(InstallTrackerFactory);
+};
+
+}  // namespace extensions;
+
+#endif  // CHROME_BROWSER_EXTENSIONS_INSTALL_TRACKER_FACTORY_H_