Use std::default_delete as the default deleter for scoped_ptr.

chrome/browser/sync_file_system/sync_file_system_service.h

Index: chrome/browser/sync_file_system/sync_file_system_service.h
diff --git a/chrome/browser/sync_file_system/sync_file_system_service.h b/chrome/browser/sync_file_system/sync_file_system_service.h
index 0d642e6c4f85db9acaf212ceaa7cf25c5e2fe167..7bbea9d440def69dc7ba4d25149444a536157058 100644
--- a/chrome/browser/sync_file_system/sync_file_system_service.h
+++ b/chrome/browser/sync_file_system/sync_file_system_service.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_SERVICE_H_
 
 #include <map>
+#include <memory>
 #include <string>
 
 #include "base/basictypes.h"
@@ -91,7 +92,7 @@ class SyncFileSystemService
   friend class SyncFileSystemServiceFactory;
   friend class SyncFileSystemServiceTest;
   friend class SyncFileSystemTest;
-  friend struct base::DefaultDeleter<SyncFileSystemService>;
+  friend std::default_delete<SyncFileSystemService>;
   friend class LocalSyncRunner;
   friend class RemoteSyncRunner;