Remove redundant DCHECKs

components/sync/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 COMPONENTS_SYNC_BASE_ORDINAL_H_
 #define COMPONENTS_SYNC_BASE_ORDINAL_H_
 
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 387 matching lines @@
 
 template <typename Traits>
 int Ordinal<Traits>::GetDigitValue(const std::string& bytes, size_t i) {
   return GetDigit(bytes, i) - kZeroDigit;
 }
 
 template <typename Traits>
 int Ordinal<Traits>::AddDigitValue(std::string* bytes,
                                    size_t i,
                                    int digit_value) {
-  DCHECK_GE(i, 0U);
   DCHECK_LT(i, bytes->length());
 
   for (int j = static_cast<int>(i); j >= 0 && digit_value > 0; --j) {
     int byte_j_value = GetDigitValue(*bytes, j) + digit_value;
     digit_value = byte_j_value / kRadix;
     DCHECK_LE(digit_value, 1);
     byte_j_value %= kRadix;
     (*bytes)[j] = static_cast<char>(kZeroDigit + byte_j_value);
   }
   return digit_value;
@@ skipping 64 matching lines @@
   DCHECK_LT(midpoint, end_bytes);
 
   Ordinal<Traits> midpoint_ordinal(midpoint);
   DCHECK(midpoint_ordinal.IsValid());
   return midpoint_ordinal;
 }
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_BASE_ORDINAL_H_