Revert 257524 "Move IsStringASCII/UTF8 to base namespace."

trunk/src/net/base/mime_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 <algorithm>
 #include <iterator>
 #include <map>
 #include <string>
 
 #include "base/containers/hash_tables.h"
@@ skipping 622 matching lines @@
   "message/",
   "model/",
   "multipart/",
   "text/",
   "video/",
 };
 
 bool MimeUtil::IsMimeType(const std::string& type_string) const {
   // MIME types are always ASCII and case-insensitive (at least, the top-level
   // and secondary types we care about).
-  if (!base::IsStringASCII(type_string))
+  if (!IsStringASCII(type_string))
     return false;
 
   if (type_string == "*/*" || type_string == "*")
     return true;
 
   for (size_t i = 0; i < arraysize(legal_top_level_types); ++i) {
     if (StartsWithASCII(type_string, legal_top_level_types[i], false) &&
         type_string.length() > strlen(legal_top_level_types[i])) {
       return true;
     }
@@ skipping 370 matching lines @@
   post_data->append("\r\n" + value + "\r\n");
 }
 
 void AddMultipartFinalDelimiterForUpload(const std::string& mime_boundary,
                                          std::string* post_data) {
   DCHECK(post_data);
   post_data->append("--" + mime_boundary + "--\r\n");
 }
 
 }  // namespace net