Replace base::str[n]casecmp with helper functions.

net/cookies/cookie_util.cc

 // 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.
 
 #include "net/cookies/cookie_util.h"
 
 #include <cstdio>
 #include <cstdlib>
 
 #include "base/logging.h"
@@ skipping 107 matching lines @@
   while (tokenizer.GetNext()) {
     const std::string token = tokenizer.token();
     DCHECK(!token.empty());
     bool numerical = base::IsAsciiDigit(token[0]);
 
     // String field
     if (!numerical) {
       if (!found_month) {
         for (int i = 0; i < kMonthsLen; ++i) {
           // Match prefix, so we could match January, etc
-          if (base::strncasecmp(token.c_str(), kMonths[i], 3) == 0) {
+          if (base::StartsWith(token, base::StringPiece(kMonths[i], 3),
+                               base::CompareCase::INSENSITIVE_ASCII)) {
             exploded.month = i + 1;
             found_month = true;
             break;
           }
         }
       } else {
         // If we've gotten here, it means we've already found and parsed our
         // month, and we have another string, which we would expect to be the
         // the time zone name.  According to the RFC and my experiments with
         // how sites format their expirations, we don't have much of a reason
@@ skipping 122 matching lines @@
       buffer.append("; ");
     buffer.append(i->first.begin(), i->first.end());
     buffer.push_back('=');
     buffer.append(i->second.begin(), i->second.end());
   }
   return buffer;
 }
 
 }  // namespace cookie_util
 }  // namespace net