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

ios/chrome/browser/application_context_impl.cc

 // Copyright 2014 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/application_context_impl.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 204 matching lines @@
   if (!chrome_browser_state_manager_)
     chrome_browser_state_manager_.reset(new ChromeBrowserStateManagerImpl());
   return chrome_browser_state_manager_.get();
 }
 
 metrics_services_manager::MetricsServicesManager*
 ApplicationContextImpl::GetMetricsServicesManager() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!metrics_services_manager_) {
     metrics_services_manager_.reset(
-        new metrics_services_manager::MetricsServicesManager(base::WrapUnique(
-            new IOSChromeMetricsServicesManagerClient(GetLocalState()))));
+        new metrics_services_manager::MetricsServicesManager(
+            base::MakeUnique<IOSChromeMetricsServicesManagerClient>(
+                GetLocalState())));
   }
   return metrics_services_manager_.get();
 }
 
 metrics::MetricsService* ApplicationContextImpl::GetMetricsService() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return GetMetricsServicesManager()->GetMetricsService();
 }
 
 variations::VariationsService* ApplicationContextImpl::GetVariationsService() {
@@ skipping 115 matching lines @@
           worker_pool->GetSequenceToken(),
           base::SequencedWorkerPool::SKIP_ON_SHUTDOWN));
 
   gcm_driver_ = gcm::CreateGCMDriverDesktop(
       base::WrapUnique(new gcm::GCMClientFactory), GetLocalState(), store_path,
       GetSystemURLRequestContext(), ::GetChannel(),
       web::WebThread::GetTaskRunnerForThread(web::WebThread::UI),
       web::WebThread::GetTaskRunnerForThread(web::WebThread::IO),
       blocking_task_runner);
 }