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

chrome/browser/search_engines/template_url_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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/strings/string_split.h"
@@ skipping 1087 matching lines @@
   ASSERT_EQ(t_url, model()->GetTemplateURLForHost("google.fr"));
   EXPECT_TRUE(model()->GetTemplateURLForHost("google.co.uk") == NULL);
   EXPECT_EQ("google.fr", t_url->url_ref().GetHost());
   EXPECT_EQ(ASCIIToUTF16("google.fr"), t_url->keyword());
 }
 
 // Make sure TemplateURLService generates a KEYWORD_GENERATED visit for
 // KEYWORD visits.
 TEST_F(TemplateURLServiceTest, GenerateVisitOnKeyword) {
   test_util_.VerifyLoad();
-  test_util_.profile()->CreateHistoryService(true, false);
+  ASSERT_TRUE(test_util_.profile()->CreateHistoryService(true, false));
 
   // Create a keyword.
   TemplateURL* t_url = AddKeywordWithDate(
       "keyword", "keyword", "http://foo.com/foo?query={searchTerms}",
       "http://sugg1", std::string(), "http://icon1", true, "UTF-8;UTF-16",
       base::Time::Now(), base::Time::Now());
 
   // Add a visit that matches the url of the keyword.
   HistoryService* history =
       HistoryServiceFactory::GetForProfile(test_util_.profile(),
@@ skipping 447 matching lines @@
   EXPECT_EQ(8U, loaded_url->input_encodings().size());
 
   // Reload the model to verify it was actually saved to the database and the
   // duplicate encodings were removed.
   test_util_.ResetModel(true);
   ASSERT_EQ(initial_count + 1, model()->GetTemplateURLs().size());
   loaded_url = model()->GetTemplateURLForKeyword(ASCIIToUTF16("keyword"));
   ASSERT_FALSE(loaded_url == NULL);
   EXPECT_EQ(4U, loaded_url->input_encodings().size());
 }