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

chrome/browser/chromeos/first_run/step.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/first_run/step.h"
 
 #include <stddef.h>
 
 #include <cctype>
+#include <memory>
 
 #include "ash/first_run/first_run_helper.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/ui/webui/chromeos/first_run/first_run_actor.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/views/widget/widget.h"
 
 namespace {
 
 // Converts from "with-dashes-names" to "WithDashesNames".
 std::string ToCamelCase(const std::string& name) {
   std::string result;
@@ skipping 59 matching lines @@
       base::TimeDelta::FromMinutes(3),
       50,
       base::HistogramBase::kUmaTargetedHistogramFlag);
   histogram->AddTime(base::Time::Now() - show_time_);
   show_time_ = base::Time();
 }
 
 }  // namespace first_run
 }  // namespace chromeos