Create AccountServiceFlagFetcher which downloads an account's Gaia service flags.

chrome/browser/signin/fake_profile_oauth2_token_service.cc

Index: chrome/browser/signin/fake_profile_oauth2_token_service.cc
diff --git a/chrome/browser/signin/fake_profile_oauth2_token_service.cc b/chrome/browser/signin/fake_profile_oauth2_token_service.cc
index 938979aa0a53103fe526ed1c873ffd97b3eb95d4..da34533194dc8628a08528657ee06a25382383ba 100644
--- a/chrome/browser/signin/fake_profile_oauth2_token_service.cc
+++ b/chrome/browser/signin/fake_profile_oauth2_token_service.cc
@@ -67,6 +67,10 @@ void FakeProfileOAuth2TokenService::IssueRefreshTokenForUser(
   }
 }
 
+void FakeProfileOAuth2TokenService::IssueAllRefreshTokensLoaded() {
+  FireRefreshTokensLoaded();
+}
+
 void FakeProfileOAuth2TokenService::IssueAllTokensForAccount(
     const std::string& account_id,
     const std::string& access_token,
@@ -79,6 +83,17 @@ void FakeProfileOAuth2TokenService::IssueAllTokensForAccount(
                    expiration);
 }
 
+void FakeProfileOAuth2TokenService::IssueErrorForAllPendingRequestsForAccount(
+    const std::string& account_id,
+    const GoogleServiceAuthError& error) {
+  CompleteRequests(account_id,
+                   true,
+                   ScopeSet(),
+                   error,
+                   std::string(),
+                   base::Time());
+}
+
 void FakeProfileOAuth2TokenService::IssueTokenForScope(
     const ScopeSet& scope,
     const std::string& access_token,