[s13n] Add CancelAllLoginRequests API to identity_test_utils

This CL implements CancelAllLoginRequests with exposing it through
identity_test_utils.h.

Bug: 926869
Change-Id: Iee7ef6fafbd60d4f04da2d8469b60c3d29b0f538
Reviewed-on: https://chromium-review.googlesource.com/c/1448077
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#628295}

services/identity/public/cpp/identity_manager.h

@@ -399,6 +399,9 @@ class IdentityManager : public SigninManagerBase::Observer,
 
   friend void DisableAccessTokenFetchRetries(IdentityManager* identity_manager);
 
+  friend void CancelAllOngoingGaiaCookieOperations(
+      IdentityManager* identity_manager);
+
   friend void SetCookieAccounts(
       IdentityManager* identity_manager,
       network::TestURLLoaderFactory* test_url_loader_factory,

services/identity/public/cpp/identity_test_utils.cc

@@ -394,4 +394,8 @@ void DisableAccessTokenFetchRetries(IdentityManager* identity_manager) {
       ->set_max_authorization_token_fetch_retries_for_testing(0);
 }
 
+void CancelAllOngoingGaiaCookieOperations(IdentityManager* identity_manager) {
+  identity_manager->GetGaiaCookieManagerService()->CancelAll();
+}
+
 }  // namespace identity

services/identity/public/cpp/identity_test_utils.h

@@ -154,6 +154,9 @@ void UpdatePersistentErrorOfRefreshTokenForAccount(
 // Disables internal retries of failed access token fetches.
 void DisableAccessTokenFetchRetries(IdentityManager* identity_manager);
 
+// Cancels all ongoing operations related to the accounts in the Gaia cookie.
+void CancelAllOngoingGaiaCookieOperations(IdentityManager* identity_manager);
+
 }  // namespace identity
 
 #endif  // SERVICES_IDENTITY_PUBLIC_CPP_IDENTITY_TEST_UTILS_H_