Perform alarm's period limit check while reading alarm info from StateStore.

extensions/browser/api/alarms/alarm_manager.h

Index: extensions/browser/api/alarms/alarm_manager.h
diff --git a/extensions/browser/api/alarms/alarm_manager.h b/extensions/browser/api/alarms/alarm_manager.h
index f534ea923f1d6fb56974b71b26abca1154cee0d8..c5917f8470fc92d5ddbf21888906fbae46ae9a57 100644
--- a/extensions/browser/api/alarms/alarm_manager.h
+++ b/extensions/browser/api/alarms/alarm_manager.h
@@ -129,6 +129,8 @@ class AlarmManager : public BrowserContextKeyedAPI,
                            DifferentMinimumGranularities);
   FRIEND_TEST_ALL_PREFIXES(ExtensionAlarmsSchedulingTest,
                            RepeatingAlarmsScheduledPredictably);
+  FRIEND_TEST_ALL_PREFIXES(ExtensionAlarmsSchedulingTest,
+                           PollFrequencyFromStoredAlarm);
   friend class BrowserContextKeyedAPIFactory<AlarmManager>;
 
   typedef std::string ExtensionId;
@@ -184,6 +186,7 @@ class AlarmManager : public BrowserContextKeyedAPI,
   // Syncs our alarm data for the given extension to/from the state storage.
   void WriteToStorage(const std::string& extension_id);
   void ReadFromStorage(const std::string& extension_id,
+                       bool is_unpacked,
                        std::unique_ptr<base::Value> value);
 
   // Set the timer to go off at the specified |time|, and set |next_poll_time|