Remove <iostream> where possible.

chrome/installer/util/delete_tree_work_item_unittest.cc

 // Copyright (c) 2006-2008 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 <windows.h>
 
 #include <fstream>
-#include <iostream>
 
 #include "base/base_paths.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/scoped_ptr.h"
 #include "base/string_util.h"
 #include "chrome/installer/util/delete_tree_work_item.h"
 #include "chrome/installer/util/work_item.h"
@@ skipping 194 matching lines @@
 
   // verify everything is still there.
   EXPECT_TRUE(file_util::PathExists(key_path));
   EXPECT_TRUE(file_util::PathExists(file_name_delete_1));
   EXPECT_TRUE(file_util::PathExists(file_name_delete_2));
 
   TerminateProcess(pi.hProcess, 0);
   // make sure the handle is closed.
   WaitForSingleObject(pi.hProcess, INFINITE);
 }