Pass FROM_HERE to ObserverListThreadSafe::Notify to improve profile.

base/power_monitor/power_monitor.cc

 // Copyright 2013 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 "base/power_monitor/power_monitor.h"
 #include "base/power_monitor/power_monitor_source.h"
 
 namespace base {
 
 static PowerMonitor* g_power_monitor = NULL;
@@ skipping 27 matching lines @@
   return source_.get();
 }
 
 bool PowerMonitor::IsOnBatteryPower() {
   return source_->IsOnBatteryPower();
 }
 
 void PowerMonitor::NotifyPowerStateChange(bool battery_in_use) {
   DVLOG(1) << "PowerStateChange: " << (battery_in_use ? "On" : "Off")
            << " battery";
-  observers_->Notify(&PowerObserver::OnPowerStateChange, battery_in_use);
+  observers_->Notify(FROM_HERE, &PowerObserver::OnPowerStateChange,
+                     battery_in_use);
 }
 
 void PowerMonitor::NotifySuspend() {
   DVLOG(1) << "Power Suspending";
-  observers_->Notify(&PowerObserver::OnSuspend);
+  observers_->Notify(FROM_HERE, &PowerObserver::OnSuspend);
 }
 
 void PowerMonitor::NotifyResume() {
   DVLOG(1) << "Power Resuming";
-  observers_->Notify(&PowerObserver::OnResume);
+  observers_->Notify(FROM_HERE, &PowerObserver::OnResume);
 }
 
 }  // namespace base