[Profiles] Update legacy default profile names.

chrome/browser/profiles/profile_info_cache.h

Index: chrome/browser/profiles/profile_info_cache.h
diff --git a/chrome/browser/profiles/profile_info_cache.h b/chrome/browser/profiles/profile_info_cache.h
index f8c4390d16a34ace92f709560d19cbe02f757482..41fc3dfe24e4902f2c66a0dc0e5359d2dfd9355e 100644
--- a/chrome/browser/profiles/profile_info_cache.h
+++ b/chrome/browser/profiles/profile_info_cache.h
@@ -206,6 +206,11 @@ class ProfileInfoCache : public ProfileInfoInterface,
   void OnAvatarPictureSaved(const std::string& file_name,
                             const base::FilePath& profile_path);
 
+  // Migrate any legacy profile names ("First user", "Default Profile") to
+  // new style default names ("Person 1"), and download and high-res avatars
+  // used by the profiles.
+  void MigrateLegacyProfileNamesAndDownloadAvatars();
+
   PrefService* prefs_;
   std::vector<std::string> sorted_keys_;
   base::FilePath user_data_dir_;