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

ios/chrome/browser/autocomplete/shortcuts_backend_factory.mm

 // 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 "ios/chrome/browser/autocomplete/shortcuts_backend_factory.h"
 
+#include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/omnibox/browser/shortcuts_backend.h"
 #include "components/omnibox/browser/shortcuts_constants.h"
 #include "components/prefs/pref_service.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/history/history_service_factory.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
 #include "ios/chrome/browser/search_engines/ui_thread_search_terms_data.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #include "ios/web/public/web_thread.h"
 
 namespace ios {
 namespace {
 
 scoped_refptr<ShortcutsBackend> CreateShortcutsBackend(
     ios::ChromeBrowserState* browser_state,
     bool suppress_db) {
   scoped_refptr<ShortcutsBackend> shortcuts_backend(new ShortcutsBackend(
       ios::TemplateURLServiceFactory::GetForBrowserState(browser_state),
-      make_scoped_ptr(new ios::UIThreadSearchTermsData(browser_state)),
+      base::WrapUnique(new ios::UIThreadSearchTermsData(browser_state)),
       ios::HistoryServiceFactory::GetForBrowserState(
           browser_state, ServiceAccessType::EXPLICIT_ACCESS),
       web::WebThread::GetTaskRunnerForThread(web::WebThread::DB),
       browser_state->GetStatePath().Append(kShortcutsDatabaseName),
       suppress_db));
   return shortcuts_backend->Init() ? shortcuts_backend : nullptr;
 }
 
 }  // namespace
 
@@ skipping 33 matching lines @@
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
   return CreateShortcutsBackend(browser_state, false /* suppress_db */);
 }
 
 bool ShortcutsBackendFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 }  // namespace ios