Remove use of <iostream> where unnecessary.

chrome_frame/test/reliability/page_load_test.cc

 // Copyright (c) 2011 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.
 //
 // This file provides reliablity tests which run for ChromeFrame.
 //
 // Usage:
 // <reliability test exe> --list=file --startline=start --endline=end [...]
 // Upon invocation, it visits each of the URLs on line numbers between start
 // and end, inclusive, stored in the input file. The line number starts from 1.
 //
 // Optional Switches:
 // --iterations=num: goes through the list of URLs constructed in usage 2 or 3
 //                   num times.
 // --memoryusage: prints out memory usage when visiting each page.
 // --logfile=filepath: saves the visit log to the specified path.
 // --timeout=seconds: time out as specified in seconds during each
 //                    page load.
 // --nopagedown: won't simulate page down key presses after page load.
 // --noclearprofile: do not clear profile dir before firing up each time.
 // --savedebuglog: save Chrome, V8, and test debug log for each page loaded.
 #include <fstream>
-#include <iostream>
+#include <ostream>
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/file_version_info.h"
 #include "base/i18n/time_formatting.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/test/test_file_util.h"
@@ skipping 545 matching lines @@
             parsed_command_line.GetSwitchValuePath(switches::kJavaScriptFlags));
         if (v8_command_line.HasSwitch(kV8LogFileSwitch)) {
           g_v8_log_path = v8_command_line.GetSwitchValuePath(kV8LogFileSwitch);
           if (!file_util::AbsolutePath(&g_v8_log_path))
             g_v8_log_path = FilePath();
         }
       }
     }
   }
 }