Save display preference on boot

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 618af72aa3837bcb4afd990e4140864dd76da6bb..f4b434211892ef5ba6f8ad9169d3dcca5d8410f4 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -31,7 +31,6 @@
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/contacts/contact_manager.h"
 #include "chrome/browser/chromeos/dbus/cros_dbus_service.h"
-#include "chrome/browser/chromeos/display/display_configuration_observer.h"
 #include "chrome/browser/chromeos/extensions/default_app_order.h"
 #include "chrome/browser/chromeos/extensions/extension_system_event_observer.h"
 #include "chrome/browser/chromeos/external_metrics.h"
@@ -615,9 +614,6 @@ void ChromeBrowserMainPartsChromeos::PostProfileInit() {
 
   peripheral_battery_observer_.reset(new PeripheralBatteryObserver());
 
-  display_configuration_observer_.reset(
-      new DisplayConfigurationObserver());
-
   g_browser_process->platform_part()->InitializeAutomaticRebootManager();
 
   // This observer cannot be created earlier because it requires the shell to be
@@ -719,10 +715,6 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopRun() {
   imageburner::BurnManager::Shutdown();
   CrasAudioHandler::Shutdown();
 
-  // Let classes unregister themselves as observers of the ash::Shell singleton
-  // before the shell is destroyed.
-  display_configuration_observer_.reset();
-
   // Detach D-Bus clients before DBusThreadManager is shut down.
   power_button_observer_.reset();
   idle_action_warning_observer_.reset();