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

ios/chrome/browser/application_context_impl.h

Index: ios/chrome/browser/application_context_impl.h
diff --git a/ios/chrome/browser/application_context_impl.h b/ios/chrome/browser/application_context_impl.h
index 02bd11c58c7d91c48147f702179c46ff2e1f4a5a..697b19ee10a06c42e5df6a88f9281845ae76163e 100644
--- a/ios/chrome/browser/application_context_impl.h
+++ b/ios/chrome/browser/application_context_impl.h
@@ -5,11 +5,11 @@
 #ifndef IOS_CHROME_BROWSER_APPLICATION_CONTEXT_IMPL_H_
 #define IOS_CHROME_BROWSER_APPLICATION_CONTEXT_IMPL_H_
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "ios/chrome/browser/application_context.h"
 
@@ -78,17 +78,17 @@ class ApplicationContextImpl : public ApplicationContext {
   void CreateGCMDriver();
 
   base::ThreadChecker thread_checker_;
-  scoped_ptr<PrefService> local_state_;
-  scoped_ptr<net_log::ChromeNetLog> net_log_;
-  scoped_ptr<network_time::NetworkTimeTracker> network_time_tracker_;
-  scoped_ptr<IOSChromeIOThread> ios_chrome_io_thread_;
-  scoped_ptr<metrics_services_manager::MetricsServicesManager>
+  std::unique_ptr<PrefService> local_state_;
+  std::unique_ptr<net_log::ChromeNetLog> net_log_;
+  std::unique_ptr<network_time::NetworkTimeTracker> network_time_tracker_;
+  std::unique_ptr<IOSChromeIOThread> ios_chrome_io_thread_;
+  std::unique_ptr<metrics_services_manager::MetricsServicesManager>
       metrics_services_manager_;
-  scoped_ptr<gcm::GCMDriver> gcm_driver_;
-  scoped_ptr<component_updater::ComponentUpdateService> component_updater_;
+  std::unique_ptr<gcm::GCMDriver> gcm_driver_;
+  std::unique_ptr<component_updater::ComponentUpdateService> component_updater_;
   scoped_refptr<CRLSetFetcher> crl_set_fetcher_;
   scoped_refptr<safe_browsing::SafeBrowsingService> safe_browsing_service_;
-  scoped_ptr<ios::ChromeBrowserStateManager> chrome_browser_state_manager_;
+  std::unique_ptr<ios::ChromeBrowserStateManager> chrome_browser_state_manager_;
   std::string application_locale_;
 
   // Sequenced task runner for local state related I/O tasks.