Remove window_manager.mojom.

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 fbe52754a005eda067706ce3300fc46548be5666..2e561060070d04cdfaa7e5bf14b025c784a1c7ad 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -119,8 +119,6 @@
 #include "chromeos/network/portal_detector/network_portal_detector_stub.h"
 #include "chromeos/system/statistics_provider.h"
 #include "chromeos/tpm/tpm_token_loader.h"
-#include "components/arc/arc_bridge_service.h"
-#include "components/arc/arc_service_manager.h"
 #include "components/browser_sync/common/browser_sync_switches.h"
 #include "components/device_event_log/device_event_log.h"
 #include "components/metrics/metrics_service.h"
@@ -678,14 +676,6 @@ void ChromeBrowserMainPartsChromeos::PostProfileInit() {
   // available.
   idle_action_warning_observer_.reset(new IdleActionWarningObserver());
 
-  // Tell the window manager observer to monitor window manager changes. To do
-  // so, the ash::shell needs to be available (which it is now).
-  if (arc::ArcBridgeService::GetEnabled(
-          base::CommandLine::ForCurrentProcess())) {
-    DCHECK(arc::ArcServiceManager::Get());
-    arc::ArcServiceManager::Get()->OnAshStarted();
-  }
-
   // Start watching for low disk space events to notify the user.
   low_disk_notification_.reset(new LowDiskNotification());