Use HttpRequestHeaders for extra_headers.

net/http/http_util.cc

 // Copyright (c) 2006-2008 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.
 
 // The rules for parsing content-types were borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_util.h"
 
 #include <algorithm>
@@ skipping 184 matching lines @@
     if (!LowerCaseEqualsASCII(it.name(), "range"))
       continue;
     ranges_specifier = it.values();
     // We just care about the first "Range" header, so break here.
     break;
   }
 
   if (ranges_specifier.empty())
     return false;
 
+  return ParseRangeHeader(ranges_specifier, ranges);
+}
+
+// static
+bool HttpUtil::ParseRangeHeader(const std::string& ranges_specifier,
+                                std::vector<HttpByteRange>* ranges) {
   size_t equal_char_offset = ranges_specifier.find('=');
   if (equal_char_offset == std::string::npos)
     return false;
 
   // Try to extract bytes-unit part.
   std::string::const_iterator bytes_unit_begin = ranges_specifier.begin();
   std::string::const_iterator bytes_unit_end = bytes_unit_begin +
                                                equal_char_offset;
   std::string::const_iterator byte_range_set_begin = bytes_unit_end + 1;
   std::string::const_iterator byte_range_set_end = ranges_specifier.end();
@@ skipping 466 matching lines @@
     TrimLWS(&value_begin_, &value_end_);
 
     // bypass empty values.
     if (value_begin_ != value_end_)
       return true;
   }
   return false;
 }
 
 }  // namespace net