Convert //components/[u-z]* from scoped_ptr to std::unique_ptr

BUG=554298
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Review URL: https://codereview.chromium.org/1917673002

Cr-Commit-Position: refs/heads/master@{#389596}
diff --git a/components/user_manager/user_manager_base.h b/components/user_manager/user_manager_base.h
index db40c8d0..520f7ff7 100644
--- a/components/user_manager/user_manager_base.h
+++ b/components/user_manager/user_manager_base.h
@@ -6,12 +6,12 @@
 #define COMPONENTS_USER_MANAGER_USER_MANAGER_BASE_H_
 
 #include <map>
+#include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/synchronization/lock.h"
@@ -328,7 +328,7 @@
 
   // Updates user account after locale was resolved.
   void DoUpdateAccountLocale(const AccountId& account_id,
-                             scoped_ptr<std::string> resolved_locale);
+                             std::unique_ptr<std::string> resolved_locale);
 
   // Indicates stage of loading user from prefs.
   UserLoadStage user_loading_stage_ = STAGE_NOT_LOADED;