Clean up header files.

sync/internal_api/public/base/ordinal.h

 // Copyright (c) 2012 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 SYNC_INTERNAL_API_PUBLIC_BASE_ORDINAL_H_
 #define SYNC_INTERNAL_API_PUBLIC_BASE_ORDINAL_H_
 
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 17 matching lines @@
 // This means that when Ordinal<T> is used for sorting a list, if any
 // item changes its position in the list, only its Ordinal<T> value
 // has to change to represent the new order, and all the other values
 // can stay the same.
 //
 // An Ordinal<T> is internally represented as an array of bytes, so it
 // can be serialized to and deserialized from disk.
 //
 // The Traits class should look like the following:
 //
-//   // Don't forget to #include "base/basictypes.h".
+//   // Don't forget to #include <stdint.h> and <stddef.h>.
 //   struct MyOrdinalTraits {
 //     // There must be at least two distinct values greater than kZeroDigit
 //     // and less than kMaxDigit.
 //     static const uint8_t kZeroDigit = '0';
 //     static const uint8_t kMaxDigit = '9';
 //     // kMinLength must be positive.
 //     static const size_t kMinLength = 1;
 //   };
 //
 // An Ordinal<T> is valid iff its corresponding string has at least
@@ skipping 431 matching lines @@
   DCHECK_LT(midpoint, end_bytes);
 
   Ordinal<Traits> midpoint_ordinal(midpoint);
   DCHECK(midpoint_ordinal.IsValid());
   return midpoint_ordinal;
 }
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_BASE_ORDINAL_H_