Add some includes needed by GCC 4.4.0

base/string16.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef BASE_STRING16_H_
 #define BASE_STRING16_H_
 
 // WHAT:
 // A version of std::basic_string that provides 2-byte characters even when
 // wchar_t is not implemented as a 2-byte type. You can access this class as
 // string16. We also define char16, which string16 is based upon.
 //
 // WHY:
 // On Windows, wchar_t is 2 bytes, and it can conveniently handle UTF-16/UCS-2
 // data. Plenty of existing code operates on strings encoded as UTF-16.
 //
 // On many other platforms, sizeof(wchar_t) is 4 bytes by default. We can make
 // it 2 bytes by using the GCC flag -fshort-wchar. But then std::wstring fails
 // at run time, because it calls some functions (like wcslen) that come from
 // the system's native C library -- which was built with a 4-byte wchar_t!
 // It's wasteful to use 4-byte wchar_t strings to carry UTF-16 data, and it's
 // entirely improper on those systems where the encoding of wchar_t is defined
 // as UTF-32.
 //
 // Here, we define string16, which is similar to std::wstring but replaces all
 // libc functions with custom, 2-byte-char compatible routines. It is capable
 // of carrying UTF-16-encoded data.
 
+#include <stdio.h>
 #include <string>
 
 #include "base/basictypes.h"
 
 #if defined(WCHAR_T_IS_UTF16)
 
 typedef wchar_t char16;
 typedef std::wstring string16;
 
 #elif defined(WCHAR_T_IS_UTF32)
@@ skipping 83 matching lines @@
 
 }  // namespace base
 
 typedef std::basic_string<char16, base::string16_char_traits> string16;
 
 extern std::ostream& operator<<(std::ostream& out, const string16& str);
 
 #endif  // WCHAR_T_IS_UTF32
 
 #endif  // BASE_STRING16_H_