Remove <iostream> where possible.

ipc/ipc_tests.cc

 // Copyright (c) 2006-2009 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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(OS_POSIX)
 #include <sys/types.h>
 #include <unistd.h>
 #endif
 
 #include <stdio.h>
-#include <iostream>
 #include <string>
 
 #include "ipc/ipc_tests.h"
 
 #include "base/at_exit.h"
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug_on_start.h"
 #if defined(OS_POSIX)
 #include "base/at_exit.h"
@@ skipping 517 matching lines @@
 #endif  // PERFORMANCE_TEST
 
 int main(int argc, char** argv) {
 #ifdef PERFORMANCE_TEST
   int retval = PerfTestSuite(argc, argv).Run();
 #else
   int retval = TestSuite(argc, argv).Run();
 #endif
   return retval;
 }