Handle ListAccount fetches from within the GaiaCookieManagerService.

chrome/browser/signin/fake_gaia_cookie_manager_service.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/signin/fake_gaia_cookie_manager_service.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/signin/chrome_signin_client_factory.h"
+#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "components/signin/core/browser/profile_oauth2_token_service.h"
+#include "google_apis/gaia/gaia_constants.h"
+#include "google_apis/gaia/gaia_urls.h"
+
+FakeGaiaCookieManagerService::FakeGaiaCookieManagerService(
+    OAuth2TokenService* token_service,
+    const std::string& source,
+    SigninClient* client) :
+        GaiaCookieManagerService(token_service, source, client),
+        url_fetcher_factory_(NULL) {
+  url_fetcher_factory_.SetFakeResponse(
+      GaiaUrls::GetInstance()->ListAccountsURLWithSource(
+          GaiaConstants::kChromeSource),
+      "[\"f\", []]",
+      net::HTTP_OK,
+      net::URLRequestStatus::SUCCESS);

[Roger Tawa OOO till Jul 10th, 2015/04/15 18:51:05]

I think you can wrap lines 20-25 in a static helper function and call it from
the unit test where this Fake is used.  If you added an email argument to the
helper function, you could probably remove a lot of code from the account
reconcilor unit tests.

[Mike Lerman, 2015/04/16 13:13:46]

Discussed offline - adding helper methods to prepare a variety of responses
(List Accounts should return none, 1, 2 accounts or error).

+}
+
+// static
+KeyedService* FakeGaiaCookieManagerService::Build(
+    content::BrowserContext* context) {
+  Profile* profile = Profile::FromBrowserContext(context);
+  GaiaCookieManagerService* service = new GaiaCookieManagerService(
+      ProfileOAuth2TokenServiceFactory::GetForProfile(profile),
+      GaiaConstants::kChromeSource,
+      ChromeSigninClientFactory::GetForProfile(profile));
+  return service;
+}