Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/browser_state/chrome_browser_state_impl.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 "ios/chrome/browser/browser_state/chrome_browser_state_impl.h"
 
 #include <utility>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 181 matching lines @@
 
 bool ChromeBrowserStateImpl::IsOffTheRecord() const {
   return false;
 }
 
 base::FilePath ChromeBrowserStateImpl::GetStatePath() const {
   return state_path_;
 }
 
 void ChromeBrowserStateImpl::SetOffTheRecordChromeBrowserState(
-    scoped_ptr<ios::ChromeBrowserState> otr_state) {
+    std::unique_ptr<ios::ChromeBrowserState> otr_state) {
   DCHECK(!otr_state_);
   otr_state_ = std::move(otr_state);
 }
 
 PrefService* ChromeBrowserStateImpl::GetOffTheRecordPrefs() {
   DCHECK(prefs_);
   if (!otr_prefs_) {
     otr_prefs_ = CreateIncognitoBrowserStatePrefs(prefs_.get());
   }
   return otr_prefs_.get();
@@ skipping 38 matching lines @@
 net::SSLConfigService* ChromeBrowserStateImpl::GetSSLConfigService() {
   // If ssl_config_service_manager_ is null, this typically means that some
   // KeyedService is trying to create a RequestContext at startup,
   // but SSLConfigServiceManager is not initialized until DoFinalInit() which is
   // invoked after all KeyedServices have been initialized (see
   // http://crbug.com/171406).
   DCHECK(ssl_config_service_manager_)
       << "SSLConfigServiceManager is not initialized yet";
   return ssl_config_service_manager_->Get();
 }