Re-write many calls to WrapUnique() with MakeUnique()

chromecast/browser/test/chromecast_browser_test_helper_default.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 "chromecast/browser/test/chromecast_browser_test_helper.h"
 
 #include "base/memory/ptr_util.h"
 #include "chromecast/browser/cast_browser_context.h"
 #include "chromecast/browser/cast_browser_process.h"
 #include "chromecast/browser/cast_content_window.h"
@@ skipping 29 matching lines @@
 
  private:
   std::unique_ptr<CastContentWindow> window_;
   std::unique_ptr<content::WebContents> web_contents_;
 };
 
 }  // namespace
 
 std::unique_ptr<ChromecastBrowserTestHelper>
 ChromecastBrowserTestHelper::Create() {
-  return base::WrapUnique(new DefaultHelper());
+  return base::MakeUnique<DefaultHelper>();
 }
 
 }  // namespace shell
 }  // namespace chromecast