Use ScopedTaskEnvironment instead of MessageLoop in google_apis unit tests.

google_apis/gaia/oauth2_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.
 //
 // A complete set of unit tests for OAuth2AccessTokenFetcherImpl.
 
 #include "google_apis/gaia/oauth2_access_token_fetcher_impl.h"
 
 #include <memory>
 #include <string>
 
 #include "base/run_loop.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 #include "google_apis/gaia/oauth2_access_token_consumer.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
@@ skipping 94 matching lines @@
 
     if (!body.empty())
       url_fetcher->SetResponseString(body);
 
     EXPECT_CALL(factory_, CreateURLFetcherMock(_, url, _, _))
         .WillOnce(Return(url_fetcher));
     return url_fetcher;
   }
 
  protected:
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   MockUrlFetcherFactory factory_;
   MockOAuth2AccessTokenConsumer consumer_;
   scoped_refptr<net::TestURLRequestContextGetter> request_context_getter_;
   OAuth2AccessTokenFetcherImpl fetcher_;
 };
 
 // These four tests time out, see http://crbug.com/113446.
 TEST_F(OAuth2AccessTokenFetcherImplTest,
        DISABLED_GetAccessTokenRequestFailure) {
   TestURLFetcher* url_fetcher = SetupGetAccessToken(false, 0, std::string());
@@ skipping 129 matching lines @@
     TestURLFetcher url_fetcher(0, GURL("http://www.google.com"), NULL);
     url_fetcher.SetResponseString(kValidFailureTokenResponse);
 
     std::string error;
     EXPECT_TRUE(
         OAuth2AccessTokenFetcherImpl::ParseGetAccessTokenFailureResponse(
             &url_fetcher, &error));
     EXPECT_EQ("invalid_grant", error);
   }
 }