Revert of Reland: chromeos: Fix shelf appearing at login screen under mash

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
index b015a0530e8a33db14487e3161136dcbfa9eb4bc..ddb0dba0c79dc98ce97a8cbb3126d9d499908912 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
@@ -6,7 +6,11 @@
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
+#include "base/command_line.h"
+#include "base/lazy_instance.h"
+#include "base/macros.h"
 #include "base/memory/ptr_util.h"
+#include "build/build_config.h"
 #include "chrome/browser/chrome_browser_main.h"
 #include "chrome/browser/ui/ash/ash_init.h"
 #include "chrome/browser/ui/ash/ash_util.h"
@@ -15,20 +19,25 @@
 #include "chrome/browser/ui/ash/chrome_shell_content_state.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.h"
 #include "chrome/browser/ui/ash/media_client.h"
+#include "chrome/browser/ui/views/ash/tab_scrubber.h"
+#include "chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h"
+#include "chrome/browser/ui/views/frame/immersive_context_mus.h"
+#include "chrome/browser/ui/views/frame/immersive_handler_factory_mus.h"
+#include "chrome/common/chrome_switches.h"
+#include "ui/aura/env.h"
+#include "ui/keyboard/content/keyboard.h"
+#include "ui/keyboard/keyboard_controller.h"
+#include "ui/wm/core/capture_controller.h"
+#include "ui/wm/core/wm_state.h"
+
+#if defined(OS_CHROMEOS)
 #include "chrome/browser/ui/ash/session_controller_client.h"
 #include "chrome/browser/ui/ash/system_tray_client.h"
 #include "chrome/browser/ui/ash/volume_controller.h"
 #include "chrome/browser/ui/ash/vpn_list_forwarder.h"
-#include "chrome/browser/ui/views/ash/tab_scrubber.h"
-#include "chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h"
-#include "chrome/browser/ui/views/frame/immersive_context_mus.h"
-#include "chrome/browser/ui/views/frame/immersive_handler_factory_mus.h"
 #include "chrome/browser/ui/views/select_file_dialog_extension.h"
 #include "chrome/browser/ui/views/select_file_dialog_extension_factory.h"
-#include "ui/keyboard/content/keyboard.h"
-#include "ui/keyboard/keyboard_controller.h"
-#include "ui/wm/core/capture_controller.h"
-#include "ui/wm/core/wm_state.h"
+#endif  // defined(OS_CHROMEOS)
 
 ChromeBrowserMainExtraPartsAsh::ChromeBrowserMainExtraPartsAsh(
     ChromeBrowserMainExtraPartsViews* extra_parts_views)
@@ -46,7 +55,10 @@
     immersive_handler_factory_ = base::MakeUnique<ImmersiveHandlerFactoryMus>();
   }
 
-  session_controller_client_ = base::MakeUnique<SessionControllerClient>();
+#if defined(OS_CHROMEOS)
+  // TODO(xiyuan): Update after SesssionStateDelegate is deprecated.
+  if (chrome::IsRunningInMash())
+    session_controller_client_ = base::MakeUnique<SessionControllerClient>();
 
   // Must be available at login screen, so initialize before profile.
   system_tray_client_ = base::MakeUnique<SystemTrayClient>();
@@ -60,6 +72,7 @@
   keyboard::InitializeKeyboard();
 
   ui::SelectFileDialog::SetFactory(new SelectFileDialogExtensionFactory);
+#endif  // defined(OS_CHROMEOS)
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostProfileInit() {
@@ -88,6 +101,7 @@
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostMainMessageLoopRun() {
+#if defined(OS_CHROMEOS)
   vpn_list_forwarder_.reset();
   volume_controller_.reset();
   new_window_client_.reset();
@@ -95,6 +109,6 @@
   media_client_.reset();
   cast_config_client_media_router_.reset();
   session_controller_client_.reset();
-
+#endif
   chrome::CloseAsh();
 }