base/ header cleanup. Forward declaration instead of including.

chrome/test/mini_installer_test/mini_installer_test_util.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 "chrome/test/mini_installer_test/mini_installer_test_util.h"
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/platform_thread.h"
 #include "base/process_util.h"
+#include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/installer/util/logging_installer.h"
 #include "chrome/test/mini_installer_test/mini_installer_test_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // Change current directory so that chrome.dll from current folder
 // will not be used as fall back.
 bool MiniInstallerTestUtil::ChangeCurrentDirectory(FilePath* current_path) {
   FilePath backup_path;
@@ skipping 274 matching lines @@
            (timer < 60000)) {
       PlatformThread::Sleep(200);
       timer = timer + 200;
     }
   } else {
   if (base::GetProcessCount(process_name, NULL) != 0)
       return false;
   }
   return true;
 }