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

net/socket/transport_client_socket_pool.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/socket/transport_client_socket_pool.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 205 matching lines @@
 }
 
 int TransportConnectJob::DoTransportConnect() {
   next_state_ = STATE_TRANSPORT_CONNECT_COMPLETE;
   transport_socket_.reset(client_socket_factory_->CreateTransportClientSocket(
         addresses_, net_log().net_log(), net_log().source()));
   connect_start_time_ = base::TimeTicks::Now();
   int rv = transport_socket_->Connect(&callback_);
   if (rv == ERR_IO_PENDING &&
       AddressListStartsWithIPv6AndHasAnIPv4Addr(addresses_)) {
-    fallback_timer_.Start(FROM_HERE,
+    fallback_timer_.Start(
         base::TimeDelta::FromMilliseconds(kIPv6FallbackTimerInMs),
         this, &TransportConnectJob::DoIPv6FallbackTransportConnect);
   }
   return rv;
 }
 
 int TransportConnectJob::DoTransportConnectComplete(int result) {
   if (result == OK) {
     bool is_ipv4 = addresses_.head()->ai_family != AF_INET6;
     DCHECK(connect_start_time_ != base::TimeTicks());
@@ skipping 245 matching lines @@
 
 base::TimeDelta TransportClientSocketPool::ConnectionTimeout() const {
   return base_.ConnectionTimeout();
 }
 
 ClientSocketPoolHistograms* TransportClientSocketPool::histograms() const {
   return base_.histograms();
 }
 
 }  // namespace net