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

ios/chrome/browser/favicon/favicon_service_factory.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 "ios/chrome/browser/favicon/favicon_service_factory.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/favicon/core/favicon_service.h"
 #include "components/keyed_service/core/service_access_type.h"
@@ skipping 34 matching lines @@
   DependsOn(ios::HistoryServiceFactory::GetInstance());
 }
 
 FaviconServiceFactory::~FaviconServiceFactory() {
 }
 
 std::unique_ptr<KeyedService> FaviconServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
-  return base::WrapUnique(new favicon::FaviconService(
+  return base::MakeUnique<favicon::FaviconService>(
       base::WrapUnique(new FaviconClientImpl(browser_state)),
       ios::HistoryServiceFactory::GetForBrowserState(
-          browser_state, ServiceAccessType::EXPLICIT_ACCESS)));
+          browser_state, ServiceAccessType::EXPLICIT_ACCESS));
 }
 
 }  // namespace ios