Modify experimental identity flow to display scope descriptions and details.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 08de015e2ced3f50081c1875d39257b1dd0baa2c..07ab4d9cfb43b378da75c366dc7379dcf8b0e26c 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -350,7 +350,8 @@ class ExtensionService
   // permissions in the |extension|'s manifest and re-enables the
   // extension.
   void GrantPermissionsAndEnableExtension(
-      const extensions::Extension* extension);
+      const extensions::Extension* extension,
+      bool record_oauth2_grant);
 
   // Check for updates (or potentially new extensions from external providers)
   void CheckForExternalUpdates();