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

chrome/browser/autocomplete/history_url_provider_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 "chrome/browser/autocomplete/history_url_provider.h"
 
 #include <algorithm>
 
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
@@ skipping 190 matching lines @@
   }
 };
 
 void HistoryURLProviderTest::OnProviderUpdate(bool updated_matches) {
   if (autocomplete_->done())
     base::MessageLoop::current()->Quit();
 }
 
 void HistoryURLProviderTest::SetUpImpl(bool no_db) {
   profile_.reset(new TestingProfile());
-  profile_->CreateHistoryService(true, no_db);
+  ASSERT_TRUE(profile_->CreateHistoryService(true, no_db));
   if (!no_db) {
     profile_->BlockUntilHistoryProcessesPendingRequests();
     profile_->BlockUntilHistoryIndexIsRefreshed();
   }
   history_service_ =
       HistoryServiceFactory::GetForProfile(profile_.get(),
                                            Profile::EXPLICIT_ACCESS);
 
   autocomplete_ = new HistoryURLProvider(this, profile_.get(), "en-US,en,ko");
   TemplateURLServiceFactory::GetInstance()->SetTestingFactoryAndUse(
@@ skipping 641 matching lines @@
       EXPECT_EQ(test_cases[i].offsets[match_index],
                 match.contents_class[match_index].offset);
       EXPECT_EQ(ACMatchClassification::URL |
                 (match_index == test_cases[i].match_classification_index ?
                  ACMatchClassification::MATCH : 0),
                 match.contents_class[match_index].style);
     }
     EXPECT_EQ(npos, test_cases[i].offsets[match.contents_class.size()]);
   }
 }