Replace scoped_ptr with std::unique_ptr in //ui

ui/views/test/default_platform_test_helper.cc

 // Copyright 2016 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 "base/memory/ptr_util.h"
 #include "ui/views/test/platform_test_helper.h"
 
 namespace views {
 namespace {
 
 class DefaultPlatformTestHelper : public PlatformTestHelper {
  public:
   DefaultPlatformTestHelper() {}
 
   ~DefaultPlatformTestHelper() override {}
 
   bool IsMus() const override { return false; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DefaultPlatformTestHelper);
 };
 
 }  // namespace
 
 // static
-scoped_ptr<PlatformTestHelper> PlatformTestHelper::Create() {
-  return make_scoped_ptr(new DefaultPlatformTestHelper);
+std::unique_ptr<PlatformTestHelper> PlatformTestHelper::Create() {
+  return base::WrapUnique(new DefaultPlatformTestHelper);
 }
 
 }  // namespace views