Convert //chrome/browser/safe_browsing from scoped_ptr to std::unique_ptr

chrome/browser/safe_browsing/incident_reporting/download_metadata_manager.h

Index: chrome/browser/safe_browsing/incident_reporting/download_metadata_manager.h
diff --git a/chrome/browser/safe_browsing/incident_reporting/download_metadata_manager.h b/chrome/browser/safe_browsing/incident_reporting/download_metadata_manager.h
index 317937a12e01e7e7af4a099924d52bd32f6e8c2a..65da12feb681418cc3bbd1a3bd108c05dd783ab1 100644
--- a/chrome/browser/safe_browsing/incident_reporting/download_metadata_manager.h
+++ b/chrome/browser/safe_browsing/incident_reporting/download_metadata_manager.h
@@ -35,7 +35,8 @@ class DownloadMetadataManager : public content::DownloadManager::Observer {
   // A callback run when the results of a call to GetDownloadDetails are ready.
   // The supplied parameter may be null, indicating that there are no persisted
   // details for the |browser_context| passed to GetDownloadDetails.
-  typedef base::Callback<void(scoped_ptr<ClientIncidentReport_DownloadDetails>)>
+  typedef base::Callback<void(
+      std::unique_ptr<ClientIncidentReport_DownloadDetails>)>
       GetDownloadDetailsCallback;
 
   // Constructs a new instance for which disk IO operations will take place in