Add asserts to TestingProfile::CreateHistoryService to ensure files are deleted

chrome/browser/autocomplete/search_provider_unittest.cc

 // Copyright 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 "chrome/browser/autocomplete/search_provider.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "base/run_loop.h"
@@ skipping 173 matching lines @@
 void SearchProviderTest::TearDownTestCase() {
   // Make sure the global instance of FieldTrialList is gone.
   delete field_trial_list_;
 }
 
 void SearchProviderTest::SetUp() {
   // Make sure that fetchers are automatically ungregistered upon destruction.
   test_factory_.set_remove_fetcher_on_delete(true);
 
   // We need both the history service and template url model loaded.
-  profile_.CreateHistoryService(true, false);
+  ASSERT_TRUE(profile_.CreateHistoryService(true, false));
   TemplateURLServiceFactory::GetInstance()->SetTestingFactoryAndUse(
       &profile_, &TemplateURLServiceFactory::BuildInstanceFor);
 
   TemplateURLService* turl_model =
       TemplateURLServiceFactory::GetForProfile(&profile_);
 
   turl_model->Load();
 
   // Reset the default TemplateURL.
   TemplateURLData data;
@@ skipping 1912 matching lines @@
       } else {
         ASSERT_NE(sug_end, sug_it) << "Failed to find " << suggestion;
         EXPECT_EQ(ASCIIToUTF16(suggestion), sug_it->suggestion());
         ++sug_it;
       }
     }
     EXPECT_EQ(sug_end, sug_it);
     EXPECT_EQ(nav_end, nav_it);
   }
 }