Remove <iostream> where possible.

chrome/installer/util/copy_tree_work_item_unittest.cc

 // Copyright (c) 2009 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/platform_thread.h"
 #include "base/process_util.h"
 #include "base/scoped_ptr.h"
 #include "base/string_util.h"
 #include "chrome/installer/util/work_item.h"
@@ skipping 686 matching lines @@
   EXPECT_TRUE(file_util::ContentsEqual(file_name_from_1, file_name_to_1));
 
   FilePath file_name_to_2(dir_name_to);
   file_name_to_2 = file_name_to_2.AppendASCII("2");
   file_name_to_2 = file_name_to_2.AppendASCII("File_2.txt");
   EXPECT_TRUE(file_util::PathExists(file_name_to_2));
   LOG(INFO) << "compare "
             << file_name_from_2.value() << " and " << file_name_to_2.value();
   EXPECT_TRUE(file_util::ContentsEqual(file_name_from_2, file_name_to_2));
 }