Remove use of <iostream> where unnecessary.

media/test/ffmpeg_tests/ffmpeg_tests.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.
 
 // Software qualification test for FFmpeg.  This test is used to certify that
 // software decoding quality and performance of FFmpeg meets a mimimum
 // standard.
 
 #include <iomanip>
-#include <iostream>
+#include <ostream>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/md5.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
@@ skipping 475 matching lines @@
 #if defined(ENABLE_WINDOWS_EXCEPTIONS)
   } __except(EXCEPTION_EXECUTE_HANDLER) {
     *log_out << "  Exception:" << std::setw(11) << GetExceptionCode()
              << " " << in_path.value() << std::endl;
     return 1;
   }
 #endif
   CommandLine::Reset();
   return 0;
 }