Add a command line flag to specify the scope to use for the permission request API.

chrome/browser/supervised_user/permission_request_creator_apiary.cc

Index: chrome/browser/supervised_user/permission_request_creator_apiary.cc
diff --git a/chrome/browser/supervised_user/permission_request_creator_apiary.cc b/chrome/browser/supervised_user/permission_request_creator_apiary.cc
index 91f93fc553d1c80013ffb5c1c8005299bc1c85f0..bfbc0dd596295a27f2ea2fe33ab2ef744ff30b1e 100644
--- a/chrome/browser/supervised_user/permission_request_creator_apiary.cc
+++ b/chrome/browser/supervised_user/permission_request_creator_apiary.cc
@@ -71,7 +71,13 @@ void PermissionRequestCreatorApiary::CreatePermissionRequest(
 
 void PermissionRequestCreatorApiary::StartFetching() {
   OAuth2TokenService::ScopeSet scopes;
-  scopes.insert(signin_wrapper_->GetSyncScopeToUse());
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kPermissionRequestApiScope)) {
+    scopes.insert(CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+        switches::kPermissionRequestApiScope));
+  } else {
+    scopes.insert(signin_wrapper_->GetSyncScopeToUse());
+  }
   access_token_request_ = oauth2_token_service_->StartRequest(
       signin_wrapper_->GetAccountIdToUse(), scopes, this);
 }