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

chrome/browser/ui/toolbar/back_forward_menu_model_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/toolbar/back_forward_menu_model.h"
 
 #include "base/path_service.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 479 matching lines @@
 #else
   EXPECT_EQ(ASCIIToUTF16("A B"), back_model->GetLabelAt(3));
   EXPECT_EQ(ASCIIToUTF16("A && B"), back_model->GetLabelAt(2));
   EXPECT_EQ(ASCIIToUTF16("A &&&& B"), back_model->GetLabelAt(1));
   EXPECT_EQ(ASCIIToUTF16("A &&&&&& B"), back_model->GetLabelAt(0));
 #endif // defined(OS_MACOSX)
 }
 
 // Test asynchronous loading of favicon from history service.
 TEST_F(BackFwdMenuModelTest, FaviconLoadTest) {
-  profile()->CreateHistoryService(true, false);
+  ASSERT_TRUE(profile()->CreateHistoryService(true, false));
   profile()->CreateFaviconService();
   Browser::CreateParams native_params(profile(), chrome::GetActiveDesktop());
   scoped_ptr<Browser> browser(
       chrome::CreateBrowserWithTestWindowForParams(&native_params));
   FaviconDelegate favicon_delegate;
 
   BackForwardMenuModel back_model(
       browser.get(), BackForwardMenuModel::BACKWARD_MENU);
   back_model.set_test_web_contents(controller().GetWebContents());
   back_model.SetMenuModelDelegate(&favicon_delegate);
@@ skipping 47 matching lines @@
   // Verify we did get the expected favicon.
   EXPECT_EQ(0, memcmp(new_icon_bitmap.getPixels(),
                       valid_icon_bitmap.getPixels(),
                       new_icon_bitmap.getSize()));
 
   // Make sure the browser deconstructor doesn't have problems.
   browser->tab_strip_model()->CloseAllTabs();
   // This is required to prevent the message loop from hanging.
   profile()->DestroyHistoryService();
 }