Implement support for monitor suspend.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index e8d9f722e6612e0c842e5832d3a88c43211cd7b9..5948f88e8817448e92fcacd07df0cd62e3bfe5ac 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -54,6 +54,7 @@
 #include "chrome/browser/chromeos/power/resume_observer.h"
 #include "chrome/browser/chromeos/power/screen_dimming_observer.h"
 #include "chrome/browser/chromeos/power/screen_lock_observer.h"
+#include "chrome/browser/chromeos/power/suspend_observer.h"
 #include "chrome/browser/chromeos/power/user_activity_notifier.h"
 #include "chrome/browser/chromeos/power/video_activity_notifier.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
@@ -576,6 +577,7 @@ void ChromeBrowserMainPartsChromeos::PostProfileInit() {
   output_observer_.reset(new OutputObserver());
   resume_observer_.reset(new ResumeObserver());
   screen_lock_observer_.reset(new ScreenLockObserver());
+  suspend_observer_.reset(new SuspendObserver());
   if (KioskModeSettings::Get()->IsKioskModeEnabled()) {
     power_state_override_ = new PowerStateOverride(
         PowerStateOverride::BLOCK_DISPLAY_SLEEP);
@@ -671,6 +673,7 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopRun() {
   // We should remove observers attached to D-Bus clients before
   // DBusThreadManager is shut down.
   screen_lock_observer_.reset();
+  suspend_observer_.reset();
   resume_observer_.reset();
   brightness_observer_.reset();
   output_observer_.reset();