chromeos: Move device shutdown handling out of chrome into ash

chrome/browser/chromeos/chrome_browser_main_chromeos.h

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.h
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.h b/chrome/browser/chromeos/chrome_browser_main_chromeos.h
index 7722f9c2da84f5b6b53fec30e3068d10d2d7228f..0847ae7f97e8e5d34fad49740a1c8003fe489714 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.h
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.h
@@ -33,13 +33,14 @@ class LoginLockStateNotifier;
 class LowDiskNotification;
 class MagnificationManager;
 class NetworkPrefStateObserver;
+class NetworkThrottlingObserver;
 class PeripheralBatteryObserver;
 class PowerPrefs;
 class RendererFreezer;
 class SessionManagerObserver;
+class ShutdownPolicyForwarder;
 class SwapMetrics;
 class WakeOnWifiManager;
-class NetworkThrottlingObserver;
 
 namespace default_app_order {
 class ExternalLoader;
@@ -87,6 +88,8 @@ class ChromeBrowserMainPartsChromeos : public ChromeBrowserMainPartsLinux {
 
   std::unique_ptr<session_manager::SessionManager> session_manager_;
 
+  std::unique_ptr<ShutdownPolicyForwarder> shutdown_policy_forwarder_;
+
   std::unique_ptr<EventRewriterController> keyboard_event_rewriters_;
 
   scoped_refptr<chromeos::ExternalMetrics> external_metrics_;