Replace scoped_ptr with std::unique_ptr in //ui

ui/message_center/popup_timers_controller.h

Index: ui/message_center/popup_timers_controller.h
diff --git a/ui/message_center/popup_timers_controller.h b/ui/message_center/popup_timers_controller.h
index d2e2db729cb3466cde4411d25d41b0a8ee514145..95e84426df557609383384c03d704a8b498f8b82 100644
--- a/ui/message_center/popup_timers_controller.h
+++ b/ui/message_center/popup_timers_controller.h
@@ -6,10 +6,10 @@
 #define UI_MESSAGE_CENTER_POPUP_TIMERS_CONTROLLER_H_
 
 #include <map>
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/message_center_observer.h"
@@ -69,7 +69,8 @@ class MESSAGE_CENTER_EXPORT PopupTimersController
   MessageCenter* message_center_;
 
   // The PopupTimerCollection contains all the managed timers by their ID.
-  using PopupTimerCollection = std::map<std::string, scoped_ptr<PopupTimer>>;
+  using PopupTimerCollection =
+      std::map<std::string, std::unique_ptr<PopupTimer>>;
   PopupTimerCollection popup_timers_;
 
   DISALLOW_COPY_AND_ASSIGN(PopupTimersController);