Add IdentityTestEnvironment::EnableOnAccountUpdatedAndOnAccountRemovedWithInfoCallbacks() method

This CL implements method to enable interactions with
AccountFetcherService in the testing context.

Bug: 927664
Change-Id: I4149ec5ffed46b8c3c34f423aa6d4cbbb58ef6ba
Reviewed-on: https://chromium-review.googlesource.com/c/1454202
Commit-Queue: Abhijeet Kandalkar <abhijeet@igalia.com>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#629185}

services/identity/public/cpp/identity_test_environment.cc

@@ -511,4 +511,9 @@ void IdentityTestEnvironment::SetFreshnessOfAccountsInGaiaCookie(
       accounts_are_fresh);
 }
 
+void IdentityTestEnvironment::
+    EnableOnAccountUpdatedAndOnAccountRemovedWithInfoCallbacks() {
+  account_fetcher_service_->EnableNetworkFetchesForTest();
+}
+
 }  // namespace identity

services/identity/public/cpp/identity_test_environment.h

@@ -257,6 +257,9 @@ class IdentityTestEnvironment : public IdentityManager::DiagnosticsObserver {
   // need to be updated.
   void SetFreshnessOfAccountsInGaiaCookie(bool accounts_are_fresh);
 
+  // Enable interaction with AccountFetcherService in testing context.
+  void EnableOnAccountUpdatedAndOnAccountRemovedWithInfoCallbacks();
+
  private:
   friend class ::IdentityTestEnvironmentChromeBrowserStateAdaptor;
   friend class ::IdentityTestEnvironmentProfileAdaptor;