Use ScopedTaskEnvironment instead of MessageLoop in components unit tests.

components/autofill/core/browser/autofill_manager_unittest.cc

 // Copyright 2013 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/autofill/core/browser/autofill_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 10 matching lines @@
 #include "base/metrics/field_trial.h"
 #include "base/metrics/metrics_hashes.h"
 #include "base/run_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/histogram_tester.h"
 #include "base/test/scoped_feature_list.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "components/autofill/core/browser/autocomplete_history_manager.h"
 #include "components/autofill/core/browser/autofill_download_manager.h"
 #include "components/autofill/core/browser/autofill_experiments.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/autofill/core/browser/autofill_test_utils.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
@@ skipping 1059 matching lines @@
             FindMetric(metric_name, entry_proto.metrics());
         ASSERT_NE(nullptr, metric);
         EXPECT_EQ(metric_value, metric->value());
         ++num_matching_entries;
       }
     }
     EXPECT_EQ(expected_num_matching_entries, num_matching_entries);
   }
 
  protected:
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   MockAutofillClient autofill_client_;
   std::unique_ptr<MockAutofillDriver> autofill_driver_;
   std::unique_ptr<TestAutofillManager> autofill_manager_;
   std::unique_ptr<TestAutofillExternalDelegate> external_delegate_;
   scoped_refptr<net::TestURLRequestContextGetter> request_context_;
   TestPaymentsClient* payments_client_;
   TestAutofillDownloadManager* download_manager_;
   TestPersonalDataManager personal_data_;
   base::FieldTrialList field_trial_list_;
   base::test::ScopedFeatureList scoped_feature_list_;
@@ skipping 4771 matching lines @@
   FormsSeen({form});
 
   // Suggestions should be displayed.
   for (const FormFieldData& field : form.fields) {
     GetAutofillSuggestions(form, field);
     EXPECT_TRUE(external_delegate_->on_suggestions_returned_seen());
   }
 }
 
 }  // namespace autofill