Remove the unused source_net_log parameter from ResolveHelper.

net/base/host_resolver_impl.h

 // Copyright (c) 2011 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.
 
 #ifndef NET_BASE_HOST_RESOLVER_IMPL_H_
 #define NET_BASE_HOST_RESOLVER_IMPL_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 151 matching lines @@
   class Job;
   class JobPool;
   class IPv6ProbeJob;
   class Request;
   typedef std::vector<Request*> RequestsList;
   typedef HostCache::Key Key;
   typedef std::map<Key, scoped_refptr<Job> > JobMap;
   typedef std::vector<HostResolver::Observer*> ObserversList;
 
   // Helper used by |Resolve()| and |ResolveFromCache()|.  Performs IP
-  // literal and cache lookup, returns OK if successfull,
+  // literal and cache lookup, returns OK if successful,
   // ERR_NAME_NOT_RESOLVED if either hostname is invalid or IP literal is
   // incompatible, ERR_DNS_CACHE_MISS if entry was not found in cache.
   int ResolveHelper(int request_id,
                     const Key& key,
                     const RequestInfo& info,
                     AddressList* addresses,
-                    const BoundNetLog& request_net_log,
-                    const BoundNetLog& source_net_log);
+                    const BoundNetLog& request_net_log);
 
   // Tries to resolve |key| as an IP, returns true and sets |net_error| if
   // succeeds, returns false otherwise.
   bool ResolveAsIP(const Key& key,
                    const RequestInfo& info,
                    int* net_error,
                    AddressList* addresses);
 
   // If |key| is not found in cache returns false, otherwise returns
   // true, sets |net_error| to the cached error code and fills |addresses|
@@ skipping 177 matching lines @@
   HostResolverFlags additional_resolver_flags_;
 
   NetLog* net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(HostResolverImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_HOST_RESOLVER_IMPL_H_