Revert "Currently, base/timer.cc calls PostTask with FROM_HERE as the Location,

net/dns/dns_transaction.cc

 // 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.
 
 #include "net/dns/dns_transaction.h"
 
 #include "base/bind.h"
 #include "base/rand_util.h"
 #include "base/values.h"
 #include "net/base/dns_util.h"
@@ skipping 288 matching lines @@
   if (rv < 0)
     return rv;
 
   DCHECK(rv);
   // TODO(agayev): when supporting EDNS0 we may need to do multiple reads
   // to read the whole response.
   return response_->Parse(rv, &ip_addresses_);
 }
 
 void DnsTransaction::StartTimer(base::TimeDelta delay) {
-  timer_.Start(FROM_HERE, delay, this, &DnsTransaction::OnTimeout);
+  timer_.Start(delay, this, &DnsTransaction::OnTimeout);
 }
 
 void DnsTransaction::RevokeTimer() {
   timer_.Stop();
 }
 
 void DnsTransaction::OnTimeout() {
   DCHECK(next_state_ == STATE_SEND_QUERY_COMPLETE ||
          next_state_ == STATE_READ_RESPONSE_COMPLETE);
   if (attempts_ == timeouts_ms_.size()) {
     DoCallback(ERR_DNS_TIMED_OUT);
     return;
   }
   next_state_ = STATE_CONNECT;
   query_.reset(query_->CloneWithNewId());
   int rv = DoLoop(OK);
   if (rv != ERR_IO_PENDING)
     DoCallback(rv);
 }
 
 void DnsTransaction::set_timeouts_ms(
     const std::vector<base::TimeDelta>& timeouts_ms) {
   DCHECK_EQ(0u, attempts_);
   timeouts_ms_ = timeouts_ms;
 }
 
 }  // namespace net