[Sync] Move //sync to //components/sync.

sync/api/string_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_API_STRING_ORDINAL_H_
-#define SYNC_API_STRING_ORDINAL_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "sync/internal_api/public/base/ordinal.h"
-
-namespace syncer {
-
-// A StringOrdinal is an Ordinal with range 'a'-'z' for printability
-// of its internal byte string representation.  (Think of
-// StringOrdinal as being short for PrintableStringOrdinal.)  It
-// should be used for data types that want to maintain one or more
-// orderings for nodes.
-//
-// Since StringOrdinals contain only printable characters, it is safe
-// to store as a string in a protobuf.
-
-struct StringOrdinalTraits {
-  static const uint8_t kZeroDigit = 'a';
-  static const uint8_t kMaxDigit = 'z';
-  static const size_t kMinLength = 1;
-};
-
-typedef Ordinal<StringOrdinalTraits> StringOrdinal;
-
-static_assert(StringOrdinal::kZeroDigit == 'a',
-              "StringOrdinal has incorrect zero digit");
-static_assert(StringOrdinal::kOneDigit == 'b',
-              "StringOrdinal has incorrect one digit");
-static_assert(StringOrdinal::kMidDigit == 'n',
-              "StringOrdinal has incorrect mid digit");
-static_assert(StringOrdinal::kMaxDigit == 'z',
-              "StringOrdinal has incorrect max digit");
-static_assert(StringOrdinal::kMidDigitValue == 13,
-              "StringOrdinal has incorrect mid digit value");
-static_assert(StringOrdinal::kMaxDigitValue == 25,
-              "StringOrdinal has incorrect max digit value");
-static_assert(StringOrdinal::kRadix == 26,
-              "StringOrdinal has incorrect radix");
-
-}  // namespace syncer
-
-#endif  // SYNC_API_STRING_ORDINAL_H_