Move ASCIIToWide and ASCIIToUTF16 to utf_string_conversions.h. I've found it...

net/base/cookie_store.h

Index: net/base/cookie_store.h
===================================================================
--- net/base/cookie_store.h	(revision 54020)
+++ net/base/cookie_store.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -9,6 +9,7 @@
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/ref_counted.h"