Update chrome os light bar location

chrome/browser/chromeos/power/light_bar.cc

 // Copyright 2014 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 "chrome/browser/chromeos/power/light_bar.h"
 
 #include <cstring>  // needed for strlen()
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 
 namespace chromeos {
 
 namespace {
 const int kDarkSuspendDelaySeconds = 4;
 const char kLightBarControlPath[] =
-    "/sys/devices/virtual/chromeos/cros_ec/lightbar/sequence";
+    "/sys/devices/platform/cros_ec_lpc.0/cros-ec-dev.0/chromeos/cros_ec/"
+    "lightbar/sequence";
 const char kKonamiCommand[] = "KONAMI";
 
 }  // namespace
 
 LightBar::LightBar()
     : control_path_(base::FilePath(kLightBarControlPath)),
       has_light_bar_(base::PathIsWritable(control_path_)) {
   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
 }
 
@@ skipping 18 matching lines @@
 
   if (!has_light_bar_)
     return;
 
   if (base::WriteFile(control_path_, kKonamiCommand, strlen(kKonamiCommand)) !=
       static_cast<int>(strlen(kKonamiCommand)))
     PLOG(WARNING) << "Unable to flash light bar during dark resume.";
 }
 
 }  // namespace chromeos