app_mode: Add runtime.onRestartRequired event.

chrome/browser/chromeos/system/automatic_reboot_manager.h

Index: chrome/browser/chromeos/system/automatic_reboot_manager.h
diff --git a/chrome/browser/chromeos/system/automatic_reboot_manager.h b/chrome/browser/chromeos/system/automatic_reboot_manager.h
index 9d292626e9af60a6313da2791f378e37c3b631f2..4892f6fb3d4dbb3d1c801fc6bed37e57f65a30f9 100644
--- a/chrome/browser/chromeos/system/automatic_reboot_manager.h
+++ b/chrome/browser/chromeos/system/automatic_reboot_manager.h
@@ -10,6 +10,7 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/time.h"
 #include "base/timer.h"
@@ -27,6 +28,8 @@ class TickClock;
 namespace chromeos {
 namespace system {
 
+class AutomaticRebootManagerObserver;
+
 // Schedules and executes automatic reboots.
 //
 // Automatic reboots may be scheduled for any number of reasons. Currently, the
@@ -90,6 +93,9 @@ class AutomaticRebootManager : public PowerManagerClient::Observer,
   explicit AutomaticRebootManager(scoped_ptr<base::TickClock> clock);
   virtual ~AutomaticRebootManager();
 
+  void AddObserver(AutomaticRebootManagerObserver* observer);
+  void RemoveObserver(AutomaticRebootManagerObserver* observer);
+
   // PowerManagerClient::Observer:
   virtual void SystemResumed(const base::TimeDelta& sleep_duration) OVERRIDE;
 
@@ -160,6 +166,8 @@ class AutomaticRebootManager : public PowerManagerClient::Observer,
 
   base::WeakPtrFactory<AutomaticRebootManager> weak_ptr_factory_;
 
+  ObserverList<AutomaticRebootManagerObserver, true> observers_;
+
   DISALLOW_COPY_AND_ASSIGN(AutomaticRebootManager);
 };