Convert //extensions/browser/api from scoped_ptr to std::unique_ptr

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 66e5fb105d5508482045b6312e148649fa8d5ab0..f534ea923f1d6fb56974b71b26abca1154cee0d8 100644
--- a/extensions/browser/api/alarms/alarm_manager.h
+++ b/extensions/browser/api/alarms/alarm_manager.h
@@ -184,7 +184,7 @@ 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,
-                       scoped_ptr<base::Value> value);
+                       std::unique_ptr<base::Value> value);
 
   // Set the timer to go off at the specified |time|, and set |next_poll_time|
   // appropriately.
@@ -214,8 +214,8 @@ class AlarmManager : public BrowserContextKeyedAPI,
   static const bool kServiceHasOwnInstanceInIncognito = true;
 
   content::BrowserContext* const browser_context_;
-  scoped_ptr<base::Clock> clock_;
-  scoped_ptr<Delegate> delegate_;
+  std::unique_ptr<base::Clock> clock_;
+  std::unique_ptr<Delegate> delegate_;
 
   // Listen to extension load notifications.
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>