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

mojo/services/network/http_connection_impl.cc

 // Copyright 2015 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 "mojo/services/network/http_connection_impl.h"
 
 #include <limits>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 357 matching lines @@
   std::string content_type;
   for (size_t i = 0; i < response->headers.size(); ++i) {
     const HttpHeader& header = *(response->headers[i]);
 
     if (body) {
       // net::HttpServerResponseInfo::SetBody() automatically sets
       // Content-Length and Content-Types, so skip the two here.
       //
       // TODO(yzshen): Consider adding to net::HttpServerResponseInfo a simple
       // setter for body which doesn't fiddle with headers.
-      if (base::strcasecmp(header.name.data(),
-                           net::HttpRequestHeaders::kContentLength) == 0) {
+      if (base::EqualsCaseInsensitiveASCII(
+              header.name, net::HttpRequestHeaders::kContentLength)) {
         continue;
-      } else if (base::strcasecmp(header.name.data(),
-                                  net::HttpRequestHeaders::kContentType) == 0) {
+      } else if (base::EqualsCaseInsensitiveASCII(
+                     header.name, net::HttpRequestHeaders::kContentType)) {
         content_type = header.value;
         continue;
       }
     }
     info.AddHeader(header.name, header.value);
   }
 
   if (body)
     info.SetBody(*body, content_type);
 
@@ skipping 31 matching lines @@
     // The close operation is initiated by this object.
     NotifyOwnerCloseIfAllDone();
   } else {
     // The close operation is initiated by |web_socket_|; start closing this
     // object.
     Close();
   }
 }
 
 }  // namespace mojo