Disable system tray features that are not going to

ash/system/tray/system_tray.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/system/tray/system_tray.h"
 
 #include "ash/ash_switches.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shell.h"
 #include "ash/shell/panel_window.h"
@@ skipping 117 matching lines @@
     (*it)->DestroyTrayView();
   }
 }
 
 void SystemTray::InitializeTrayItems(SystemTrayDelegate* delegate) {
   internal::TrayBackgroundView::Initialize();
   CreateItems(delegate);
 }
 
 void SystemTray::CreateItems(SystemTrayDelegate* delegate) {
+#if !defined(OS_WIN)
   AddTrayItem(new internal::TraySessionLengthLimit(this));
   AddTrayItem(new internal::TrayLogoutButton(this));
   AddTrayItem(new internal::TrayUser(this));
+#endif
 #if defined(OS_CHROMEOS)
   AddTrayItem(new internal::TrayEnterprise(this));
 #endif
   AddTrayItem(new internal::TrayIME(this));
   tray_accessibility_ = new internal::TrayAccessibility(this);
   AddTrayItem(tray_accessibility_);
+#if !defined(OS_WIN)
   AddTrayItem(new internal::TrayPower(this));
+#endif
 #if defined(OS_CHROMEOS)
   AddTrayItem(new internal::TrayNetwork(this));
   AddTrayItem(new internal::TrayVPN(this));
   AddTrayItem(new internal::TraySms(this));
 #endif
+#if !defined(OS_WIN)
   AddTrayItem(new internal::TrayBluetooth(this));
+#endif
   AddTrayItem(new internal::TrayDrive(this));
   AddTrayItem(new internal::TrayLocale(this));
 #if defined(OS_CHROMEOS)
   AddTrayItem(new internal::TrayDisplay(this));
   AddTrayItem(new internal::TrayScreenCapture(this));
 #endif
+#if !defined(OS_WIN)
   AddTrayItem(new internal::TrayVolume(this));
   AddTrayItem(new internal::TrayBrightness(this));
   AddTrayItem(new internal::TrayCapsLock(this));
+#endif
   AddTrayItem(new internal::TraySettings(this));
   AddTrayItem(new internal::TrayUpdate(this));
   AddTrayItem(new internal::TrayDate(this));
 
 #if defined(OS_LINUX)
   // Add memory monitor if enabled.
   CommandLine* cmd = CommandLine::ForCurrentProcess();
   if (cmd->HasSwitch(ash::switches::kAshEnableMemoryMonitor))
     AddTrayItem(new internal::TrayMonitor(this));
 #endif
@@ skipping 382 matching lines @@
         ConvertPointToWidget(this, &point);
         arrow_offset = point.x();
       }
     }
     ShowDefaultViewWithOffset(BUBBLE_CREATE_NEW, arrow_offset);
   }
   return true;
 }
 
 }  // namespace ash