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

chrome/browser/metrics/chrome_metrics_services_manager_client.cc

Index: chrome/browser/metrics/chrome_metrics_services_manager_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_services_manager_client.cc b/chrome/browser/metrics/chrome_metrics_services_manager_client.cc
index f74bac7a29c21274d67c39b2387e60bd8190ca65..9edab5b01be340c9609cbdfa02e646f07c184a99 100644
--- a/chrome/browser/metrics/chrome_metrics_services_manager_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_services_manager_client.cc
@@ -191,15 +191,15 @@ bool ChromeMetricsServicesManagerClient::GetSamplingRatePerMille(int* rate) {
 std::unique_ptr<rappor::RapporService>
 ChromeMetricsServicesManagerClient::CreateRapporService() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  return base::WrapUnique(new rappor::RapporService(
-      local_state_, base::Bind(&chrome::IsIncognitoSessionActive)));
+  return base::MakeUnique<rappor::RapporService>(
+      local_state_, base::Bind(&chrome::IsIncognitoSessionActive));
 }
 
 std::unique_ptr<variations::VariationsService>
 ChromeMetricsServicesManagerClient::CreateVariationsService() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return variations::VariationsService::Create(
-      base::WrapUnique(new ChromeVariationsServiceClient()), local_state_,
+      base::MakeUnique<ChromeVariationsServiceClient>(), local_state_,
       GetMetricsStateManager(), switches::kDisableBackgroundNetworking,
       chrome_variations::CreateUIStringOverrider());
 }