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

chrome/browser/ui/bookmarks/bookmark_prompt_controller_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/ui/bookmarks/bookmark_prompt_controller.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/bookmarks/bookmark_prompt_prefs.h"
@@ skipping 47 matching lines @@
     virtual void ShowBookmarkPrompt() OVERRIDE { ++show_prompt_call_count_; }
     int show_prompt_call_count_;
 
     DISALLOW_COPY_AND_ASSIGN(MyTestBrowserWindow);
   };
 
   virtual void SetUp() OVERRIDE {
     TestingBrowserProcess::GetGlobal()->
         SetBookmarkPromptController(new BookmarkPromptController);
     BrowserWithTestWindowTest::SetUp();
-    static_cast<TestingProfile*>(browser()->profile())->
-        CreateHistoryService(true, false);
+    ASSERT_TRUE(static_cast<TestingProfile*>(browser()->profile())->
+        CreateHistoryService(true, false));
     static_cast<TestingProfile*>(browser()->profile())->
         BlockUntilHistoryIndexIsRefreshed();
     // Simulate browser activation.
     BrowserList::SetLastActive(browser());
   }
 
   virtual void TearDown() OVERRIDE {
     TestingBrowserProcess::GetGlobal()->
         SetBookmarkPromptController(NULL);
     static_cast<TestingProfile*>(browser()->profile())->
@@ skipping 52 matching lines @@
       EXPECT_EQ(1, show_prompt_call_count());
       EXPECT_EQ(1, prefs.GetPromptImpressionCount());
     }
   }
 
   Visit(url);
 
   EXPECT_EQ(2, show_prompt_call_count());
   EXPECT_EQ(2, prefs.GetPromptImpressionCount());
 }