Remove <iostream> where possible.

chrome/browser/cocoa/nsmenuitem_additions_unittest.mm

 // Copyright (c) 2010 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.
 
 #import "chrome/browser/cocoa/nsmenuitem_additions.h"
 
 #include <Carbon/Carbon.h>
 
-#include <iostream>
+#include <ostream>
 
 #include "base/scoped_nsobject.h"
 #include "base/sys_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 NSEvent* KeyEvent(const NSUInteger modifierFlags,
                   NSString* chars,
                   NSString* charsNoMods,
                   const NSUInteger keyCode) {
   return [NSEvent keyEventWithType:NSKeyDown
@@ skipping 322 matching lines @@
     }
 
     EventModifiers modifiers = cmdKey >> 8;
     NSString* chars = keyCodeToCharacter(keyCode, modifiers, ref);
     NSString* charsIgnoringMods = keyCodeToCharacter(keyCode, 0, ref);
     NSEvent* key = KeyEvent(0x100000, chars, charsIgnoringMods, keyCode);
     ExpectKeyFiresItem(key, item, false);
   }
   CFRelease(list);
 }