Replace scoped_ptr with std::unique_ptr in //ui

ui/message_center/fake_message_center_tray_delegate.h

Index: ui/message_center/fake_message_center_tray_delegate.h
diff --git a/ui/message_center/fake_message_center_tray_delegate.h b/ui/message_center/fake_message_center_tray_delegate.h
index d0e9579291f7c75db940b75798c2c8f0c85b6ad6..2e52daa889857ba4b40a30cbabe4e0dce6197624 100644
--- a/ui/message_center/fake_message_center_tray_delegate.h
+++ b/ui/message_center/fake_message_center_tray_delegate.h
@@ -5,9 +5,10 @@
 #ifndef UI_MESSAGE_CENTER_FAKE_MESSAGE_CENTER_TRAY_DELEGATE_H_
 #define UI_MESSAGE_CENTER_FAKE_MESSAGE_CENTER_TRAY_DELEGATE_H_
 
+#include <memory>
+
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ui/message_center/message_center_tray_delegate.h"
 
 namespace message_center {
@@ -32,7 +33,7 @@ class FakeMessageCenterTrayDelegate : public MessageCenterTrayDelegate {
   MessageCenterTray* GetMessageCenterTray() override;
 
  private:
-  scoped_ptr<MessageCenterTray> tray_;
+  std::unique_ptr<MessageCenterTray> tray_;
   base::Closure quit_closure_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeMessageCenterTrayDelegate);