Switch to standard integer types in base/strings/.

base/strings/utf_offset_string_conversions.h

 // 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.
 
 #ifndef BASE_STRINGS_UTF_OFFSET_STRING_CONVERSIONS_H_
 #define BASE_STRINGS_UTF_OFFSET_STRING_CONVERSIONS_H_
 
+#include <stddef.h>
+
 #include <string>
 #include <vector>
 
 #include "base/base_export.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_piece.h"
 
 namespace base {
 
 // A helper class and associated data structures to adjust offsets into a
@@ skipping 99 matching lines @@
     if (offset > limit_)
       offset = T::npos;
   }
 
   size_t limit_;
 };
 
 }  // namespace base
 
 #endif  // BASE_STRINGS_UTF_OFFSET_STRING_CONVERSIONS_H_