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 41d35949ebc095025c4d823e63bd9888f6d4a961..838b8d0f308685c01d3d50ea75024a3b07221afc 100644
--- a/chrome/browser/signin/fake_profile_oauth2_token_service.cc
+++ b/chrome/browser/signin/fake_profile_oauth2_token_service.cc
@@ -66,6 +66,10 @@ void FakeProfileOAuth2TokenService::IssueRefreshTokenForUser(
   }
 }
 
+void FakeProfileOAuth2TokenService::IssueAllRefreshTokensLoaded() {
+  FireRefreshTokensLoaded();
+}
+
 void FakeProfileOAuth2TokenService::IssueAllTokensForAccount(
     const std::string& account_id,
     const std::string& access_token,
@@ -78,6 +82,17 @@ 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,