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

ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h

Index: ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
diff --git a/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h b/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
index 314c00b20ba3a05c69358510713aeddad9eb0cd9..38d939f52290b8e13df73df5083e98ff1cd04210 100644
--- a/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
+++ b/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
@@ -5,8 +5,9 @@
 #ifndef IOS_CHROME_BROWSER_METRICS_IOS_CHROME_METRICS_SERVICES_MANAGER_CLIENT_H_
 #define IOS_CHROME_BROWSER_METRICS_IOS_CHROME_METRICS_SERVICES_MANAGER_CLIENT_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "components/metrics_services_manager/metrics_services_manager_client.h"
 
@@ -26,9 +27,10 @@ class IOSChromeMetricsServicesManagerClient
 
  private:
   // metrics_services_manager::MetricsServicesManagerClient:
-  scoped_ptr<rappor::RapporService> CreateRapporService() override;
-  scoped_ptr<variations::VariationsService> CreateVariationsService() override;
-  scoped_ptr<metrics::MetricsServiceClient> CreateMetricsServiceClient()
+  std::unique_ptr<rappor::RapporService> CreateRapporService() override;
+  std::unique_ptr<variations::VariationsService> CreateVariationsService()
+      override;
+  std::unique_ptr<metrics::MetricsServiceClient> CreateMetricsServiceClient()
       override;
   net::URLRequestContextGetter* GetURLRequestContext() override;
   bool IsSafeBrowsingEnabled(const base::Closure& on_update_callback) override;
@@ -40,7 +42,7 @@ class IOSChromeMetricsServicesManagerClient
   metrics::MetricsStateManager* GetMetricsStateManager();
 
   // MetricsStateManager which is passed as a parameter to service constructors.
-  scoped_ptr<metrics::MetricsStateManager> metrics_state_manager_;
+  std::unique_ptr<metrics::MetricsStateManager> metrics_state_manager_;
 
   // Ensures that all functions are called from the same thread.
   base::ThreadChecker thread_checker_;