FBTF: Forward declare everything possible in testing_profile.h

chrome/browser/browsing_data_database_helper_browsertest.cc

 // Copyright (c) 2010 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/file_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browsing_data_database_helper.h"
+#include "chrome/browser/chrome_thread.h"
 #include "chrome/test/in_process_browser_test.h"
 #include "chrome/test/testing_profile.h"
 #include "chrome/test/ui_test_utils.h"
 
 static const char kTestIdentifier1[] = "http_www.google.com_0";
 
 static const char kTestIdentifierExtension[] =
   "chrome-extension_behllobkkfkfnphdnhnkndlbkcpglgmj_0";
 
 class BrowsingDataDatabaseHelperTest : public InProcessBrowserTest {
@@ skipping 55 matching lines @@
 IN_PROC_BROWSER_TEST_F(BrowsingDataDatabaseHelperTest, FetchData) {
   CreateDatabases();
   scoped_refptr<BrowsingDataDatabaseHelper> database_helper(
       new BrowsingDataDatabaseHelper(&testing_profile_));
   StopTestOnCallback stop_test_on_callback(database_helper);
   database_helper->StartFetching(
       NewCallback(&stop_test_on_callback, &StopTestOnCallback::Callback));
   // Blocks until StopTestOnCallback::Callback is notified.
   ui_test_utils::RunMessageLoop();
 }