Add more debugging CHECKS to diagnose an Android renderer crash.

components/variations/service/variations_service_unittest.cc

 // Copyright (c) 2012 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/variations/service/variations_service.h"
 
 #include <stddef.h>
 #include <utility>
 #include <vector>
 
@@ skipping 258 matching lines @@
   base::FeatureList::SetInstance(make_scoped_ptr(new base::FeatureList()));
 
   // Create a local base::FieldTrialList, to hold the field trials created in
   // this test.
   base::FieldTrialList field_trial_list(nullptr);
 
   // Create a variations service.
   TestVariationsService service(
       make_scoped_ptr(new web_resource::TestRequestAllowedNotifier(&prefs)),
       &prefs);
+  service.SetCreateTrialsFromSeedCalledForTesting(false);
 
   // Store a seed.
   service.StoreSeed(SerializeSeed(CreateTestSeed()), std::string(),
                     std::string(), base::Time::Now(), false, false);
   prefs.SetInt64(prefs::kVariationsLastFetchTime,
                  base::Time::Now().ToInternalValue());
 
   // Check that field trials are created from the seed. Since the test study has
   // only 1 experiment with 100% probability weight, we must be part of it.
   EXPECT_TRUE(service.CreateTrialsFromSeed(base::FeatureList::GetInstance()));
@@ skipping 10 matching lines @@
   base::FeatureList::SetInstance(make_scoped_ptr(new base::FeatureList()));
 
   // Create a local base::FieldTrialList, to hold the field trials created in
   // this test.
   base::FieldTrialList field_trial_list(nullptr);
 
   // Create a variations service
   TestVariationsService service(
       make_scoped_ptr(new web_resource::TestRequestAllowedNotifier(&prefs)),
       &prefs);
+  service.SetCreateTrialsFromSeedCalledForTesting(false);
 
   // Store a seed. To simulate a first run, |prefs::kVariationsLastFetchTime|
   // is left empty.
   service.StoreSeed(SerializeSeed(CreateTestSeed()), std::string(),
                     std::string(), base::Time::Now(), false, false);
   EXPECT_EQ(0, prefs.GetInt64(prefs::kVariationsLastFetchTime));
 
   // Check that field trials are created from the seed. Since the test study has
   // only 1 experiment with 100% probability weight, we must be part of it.
   EXPECT_TRUE(service.CreateTrialsFromSeed(base::FeatureList::GetInstance()));
@@ skipping 10 matching lines @@
   base::FeatureList::SetInstance(make_scoped_ptr(new base::FeatureList()));
 
   // Create a local base::FieldTrialList, to hold the field trials created in
   // this test.
   base::FieldTrialList field_trial_list(nullptr);
 
   // Create a variations service.
   TestVariationsService service(
       make_scoped_ptr(new web_resource::TestRequestAllowedNotifier(&prefs)),
       &prefs);
+  service.SetCreateTrialsFromSeedCalledForTesting(false);
 
   // Store a seed, with a fetch time 31 days in the past.
   const base::Time seed_date =
       base::Time::Now() - base::TimeDelta::FromDays(31);
   service.StoreSeed(SerializeSeed(CreateTestSeed()), std::string(),
                     std::string(), seed_date, false, false);
   prefs.SetInt64(prefs::kVariationsLastFetchTime, seed_date.ToInternalValue());
 
   // Check that field trials are not created from the seed.
   EXPECT_FALSE(service.CreateTrialsFromSeed(base::FeatureList::GetInstance()));
@@ skipping 370 matching lines @@
         << test.pref_value_before << ", " << test.version << ", "
         << test.latest_country_code;
 
     histogram_tester.ExpectUniqueSample(
         "Variations.LoadPermanentConsistencyCountryResult",
         test.expected_result, 1);
   }
 }
 
 }  // namespace variations