Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/webui/options/options_ui_browsertest.cc

Index: chrome/browser/ui/webui/options/options_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/options/options_ui_browsertest.cc b/chrome/browser/ui/webui/options/options_ui_browsertest.cc
index c03aaa8affbe4092b8fc9ebc86c6864a9b8f0adf..7bf85275110a9c96a58cb00284305369f60da43d 100644
--- a/chrome/browser/ui/webui/options/options_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/options/options_ui_browsertest.cc
@@ -134,7 +134,7 @@ void OptionsUIBrowserTest::NavigateToSettingsSubpage(
   // However, it is safe to subscribe afterwards, because the event will always
   // be posted asynchronously to the message loop.
   scoped_refptr<MessageLoopRunner> message_loop_runner(new MessageLoopRunner);
-  scoped_ptr<OptionsUI::OnFinishedLoadingCallbackList::Subscription>
+  std::unique_ptr<OptionsUI::OnFinishedLoadingCallbackList::Subscription>
       subscription = options_ui->RegisterOnFinishedLoadingCallback(
           message_loop_runner->QuitClosure());
   message_loop_runner->Run();