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

chrome/browser/safe_browsing/malware_details_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 <algorithm>
 
 #include "base/bind.h"
 #include "base/pickle.h"
 #include "base/run_loop.h"
 #include "base/time/time.h"
@@ skipping 170 matching lines @@
 class MalwareDetailsTest : public ChromeRenderViewHostTestHarness {
  public:
   typedef SafeBrowsingUIManager::UnsafeResource UnsafeResource;
 
   MalwareDetailsTest()
       : ui_manager_(new MockSafeBrowsingUIManager()) {
   }
 
   virtual void SetUp() OVERRIDE {
     ChromeRenderViewHostTestHarness::SetUp();
-    profile()->CreateHistoryService(true /* delete_file */, false /* no_db */);
+    ASSERT_TRUE(profile()->CreateHistoryService(
+        true /* delete_file */, false /* no_db */));
   }
 
   virtual void TearDown() OVERRIDE {
     profile()->DestroyHistoryService();
     ChromeRenderViewHostTestHarness::TearDown();
   }
 
   static bool ResourceLessThan(
       const ClientMalwareReportRequest::Resource* lhs,
       const ClientMalwareReportRequest::Resource* rhs) {
@@ skipping 482 matching lines @@
   pb_resource = expected.add_resources();
   pb_resource->set_id(2);
   pb_resource->set_parent_id(3);
   pb_resource->set_url(kSecondRedirectURL);
   pb_resource = expected.add_resources();
   pb_resource->set_id(3);
   pb_resource->set_url(kFirstRedirectURL);
 
   VerifyResults(actual, expected);
 }