Turn on component updater on chromeos, only for the pnacl component.

chrome/browser/component_updater/pnacl/pnacl_profile_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_COMPONENT_UPDATER_PNACL_PNACL_PROFILE_OBSERVER_H_
+#define CHROME_BROWSER_COMPONENT_UPDATER_PNACL_PNACL_PROFILE_OBSERVER_H_
+
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+class PnaclComponentInstaller;
+
+// Monitors profile switching for ChromeOS to check the per-user
+// version of PNaCl.
+class PnaclProfileObserver : public content::NotificationObserver {
+ public:
+  explicit PnaclProfileObserver(PnaclComponentInstaller* installer);
+  virtual ~PnaclProfileObserver();
+
+  virtual void Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PnaclProfileObserver);
+  content::NotificationRegistrar registrar_;
+  PnaclComponentInstaller* pnacl_installer_;
+};
+
+
+#endif  // CHROME_BROWSER_COMPONENT_UPDATER_PNACL_PNACL_PROFILE_OBSERVER_H_