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

chrome/browser/autocomplete/extension_app_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 "base/basictypes.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/autocomplete/extension_app_provider.h"
 #include "chrome/browser/history/history_service.h"
@@ skipping 24 matching lines @@
  protected:
   base::MessageLoopForUI message_loop_;
   content::TestBrowserThread ui_thread_;
   scoped_refptr<ExtensionAppProvider> app_provider_;
   scoped_ptr<TestingProfile> profile_;
   HistoryService* history_service_;
 };
 
 void ExtensionAppProviderTest::SetUp() {
   profile_.reset(new TestingProfile());
-  profile_->CreateHistoryService(true, false);
+  ASSERT_TRUE(profile_->CreateHistoryService(true, false));
   profile_->BlockUntilHistoryProcessesPendingRequests();
   history_service_ =
       HistoryServiceFactory::GetForProfile(profile_.get(),
                                            Profile::EXPLICIT_ACCESS);
 
   app_provider_ = new ExtensionAppProvider(NULL, profile_.get());
 
   struct TestExtensionApp {
     const char* app_name;
     const char* launch_url;
@@ skipping 88 matching lines @@
     ExtensionAppProvider::ExtensionApp extension_app =
         {ASCIIToUTF16(cases[i].name), url, true};
     AutocompleteMatch match =
         app_provider_->CreateAutocompleteMatch(input,
                                                extension_app,
                                                0,
                                                string16::npos);
     EXPECT_EQ(ASCIIToUTF16(cases[i].match_contents), match.contents);
   }
 }