Refactor AO2TS to make it easier to componentize.

components/proximity_auth/cryptauth/cryptauth_access_token_fetcher_impl_unittest.cc

 // Copyright 2014 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 "components/proximity_auth/cryptauth/cryptauth_access_token_fetcher_impl.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "google_apis/gaia/fake_oauth2_token_service.h"
@@ skipping 11 matching lines @@
 void SaveAccessToken(std::string* out_token, const std::string& in_token) {
   *out_token = in_token;
 }
 
 }  // namespace
 
 class ProximityAuthCryptAuthAccessTokenFetcherTest : public testing::Test {
  protected:
   ProximityAuthCryptAuthAccessTokenFetcherTest()
       : fetcher_(&token_service_, kAccountId) {
-    token_service_.AddAccount(kAccountId);
+    token_service_.GetDelegate()->UpdateCredentials(kAccountId,
+                                                    "refresh_token");
   }
 
   FakeOAuth2TokenService token_service_;
   CryptAuthAccessTokenFetcherImpl fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(ProximityAuthCryptAuthAccessTokenFetcherTest);
 };
 
 TEST_F(ProximityAuthCryptAuthAccessTokenFetcherTest, FetchSuccess) {
   std::string result;
@@ skipping 23 matching lines @@
     fetcher_.FetchAccessToken(base::Bind(SaveAccessToken, &result2));
     EXPECT_EQ(std::string(), result2);
   }
 
   token_service_.IssueAllTokensForAccount(kAccountId, kAccessToken,
                                           base::Time::Max());
   EXPECT_EQ(kAccessToken, result1);
 }
 
 }  // namespace proximity_auth