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

chrome/browser/chromeos/login/signin/merge_session_navigation_throttle.cc

 // Copyright 2015 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/login/signin/merge_session_navigation_throttle.h"
 
 #include "chrome/browser/chromeos/login/signin/merge_session_load_page.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_handle.h"
 
 // static
-scoped_ptr<content::NavigationThrottle> MergeSessionNavigationThrottle::Create(
-    content::NavigationHandle* handle) {
-  return scoped_ptr<content::NavigationThrottle>(
+std::unique_ptr<content::NavigationThrottle>
+MergeSessionNavigationThrottle::Create(content::NavigationHandle* handle) {
+  return std::unique_ptr<content::NavigationThrottle>(
       new MergeSessionNavigationThrottle(handle));
 }
 
 MergeSessionNavigationThrottle::MergeSessionNavigationThrottle(
     content::NavigationHandle* handle)
     : NavigationThrottle(handle), weak_factory_(this) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 }
 
 MergeSessionNavigationThrottle::~MergeSessionNavigationThrottle() {
@@ skipping 17 matching lines @@
        base::Bind(&MergeSessionNavigationThrottle::OnBlockingPageComplete,
                   weak_factory_.GetWeakPtr())))
       ->Show();
   return content::NavigationThrottle::DEFER;
 }
 
 void MergeSessionNavigationThrottle::OnBlockingPageComplete() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   navigation_handle()->Resume();
 }