Extend net/base/parse_number.h for parsing of negative numbers, and determining if there was overflo

net/base/sdch_manager.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/base/sdch_manager.h"
 
 #include <limits.h>
 
 #include <utility>
 
@@ skipping 364 matching lines @@
       } else if (name == "format-version") {
         if (value != "1.0")
           return SDCH_DICTIONARY_UNSUPPORTED_VERSION;
       } else if (name == "max-age") {
         int64_t seconds;
         // TODO(eroman): crbug.com/596541 -- should not accept a leading +.
         base::StringToInt64(value, &seconds);
         expiration = base::Time::Now() + base::TimeDelta::FromSeconds(seconds);
       } else if (name == "port") {
         int port;
-        if (ParseNonNegativeDecimalInt(value, &port))
+        if (ParseInt32(value, ParseIntFormat::NON_NEGATIVE, &port))
           ports.insert(port);
       }
     }
 
     if (line_end >= header_end)
       break;
     line_start = line_end + 1;
   }
 
   // Narrow fix for http://crbug.com/389451.
@@ skipping 78 matching lines @@
       entry_dict->SetInteger("tries", it->second.count);
     entry_dict->SetInteger("reason", it->second.reason);
     entry_list->Append(std::move(entry_dict));
   }
   value->Set("blacklisted", std::move(entry_list));
 
   return std::move(value);
 }
 
 }  // namespace net