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

remoting/host/heartbeat_sender.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 "remoting/host/heartbeat_sender.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "base/string_number_conversions.h"
@@ skipping 59 matching lines @@
   DCHECK(message_loop_->BelongsToCurrentThread());
   DCHECK(state_ == INITIALIZED || state_ == STOPPED);
   state_ = STARTED;
 
   full_jid_ = full_jid;
   request_.reset(signal_strategy->CreateIqRequest());
   request_->set_callback(base::Bind(&HeartbeatSender::ProcessResponse,
                                     base::Unretained(this)));
 
   DoSendStanza();
-  timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(interval_ms_), this,
+  timer_.Start(base::TimeDelta::FromMilliseconds(interval_ms_), this,
                &HeartbeatSender::DoSendStanza);
 }
 
 void HeartbeatSender::OnSignallingDisconnected() {
   DCHECK(message_loop_->BelongsToCurrentThread());
   state_ = STOPPED;
   request_.reset(NULL);
 }
 
 // Ignore any notifications other than signalling
@@ skipping 45 matching lines @@
   }
 }
 
 void HeartbeatSender::SetInterval(int interval) {
   if (interval != interval_ms_) {
     interval_ms_ = interval;
 
     // Restart the timer with the new interval.
     if (state_ == STARTED) {
       timer_.Stop();
-      timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(interval_ms_),
-                   this, &HeartbeatSender::DoSendStanza);
+      timer_.Start(base::TimeDelta::FromMilliseconds(interval_ms_), this,
+                   &HeartbeatSender::DoSendStanza);
     }
   }
 }
 
 XmlElement* HeartbeatSender::CreateHeartbeatMessage() {
   XmlElement* query = new XmlElement(
       QName(kChromotingXmlNamespace, kHeartbeatQueryTag));
   query->AddAttr(QName(kChromotingXmlNamespace, kHostIdAttr), host_id_);
   query->AddElement(CreateSignature());
   return query;
 }
 
 XmlElement* HeartbeatSender::CreateSignature() {
   XmlElement* signature_tag = new XmlElement(
       QName(kChromotingXmlNamespace, kHeartbeatSignatureTag));
 
   int64 time = static_cast<int64>(base::Time::Now().ToDoubleT());
   std::string time_str(base::Int64ToString(time));
   signature_tag->AddAttr(
       QName(kChromotingXmlNamespace, kSignatureTimeAttr), time_str);
 
   std::string message = full_jid_ + ' ' + time_str;
   std::string signature(key_pair_.GetSignature(message));
   signature_tag->AddText(signature);
 
   return signature_tag;
 }
 
 }  // namespace remoting