Remove non-cros support from ash/common/system.

ash/common/system/tiles/tiles_default_view.cc

Index: ash/common/system/tiles/tiles_default_view.cc
diff --git a/ash/common/system/tiles/tiles_default_view.cc b/ash/common/system/tiles/tiles_default_view.cc
index 6d4d66b30e595ad942f30dc2b95282d88258e842..12dd39432f4cf11cfdc19cf259dad5055b0f99a8 100644
--- a/ash/common/system/tiles/tiles_default_view.cc
+++ b/ash/common/system/tiles/tiles_default_view.cc
@@ -16,6 +16,8 @@
 #include "ash/common/system/tray/tray_popup_utils.h"
 #include "ash/common/wm_shell.h"
 #include "ash/resources/vector_icons/vector_icons.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/session_manager_client.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/geometry/insets.h"
@@ -24,11 +26,6 @@
 #include "ui/views/controls/separator.h"
 #include "ui/views/layout/box_layout.h"
 
-#if defined(OS_CHROMEOS)
-#include "chromeos/dbus/dbus_thread_manager.h"
-#include "chromeos/dbus/session_manager_client.h"
-#endif
-
 namespace {
 
 // The ISO-639 code for the Hebrew locale. The help icon asset is a '?' which is
@@ -87,7 +84,6 @@ void TilesDefaultView::Init() {
   AddChildView(help_button_);
   AddChildView(TrayPopupUtils::CreateVerticalSeparator());
 
-#if !defined(OS_WIN)
   lock_button_ =
       new SystemMenuButton(this, TrayPopupInkDropStyle::HOST_CENTERED,
                            kSystemMenuLockIcon, IDS_ASH_STATUS_TRAY_LOCK);
@@ -106,7 +102,6 @@ void TilesDefaultView::Init() {
   bool reboot = WmShell::Get()->shutdown_controller()->reboot_on_shutdown();
   power_button_->SetTooltipText(l10n_util::GetStringUTF16(
       reboot ? IDS_ASH_STATUS_TRAY_REBOOT : IDS_ASH_STATUS_TRAY_SHUTDOWN));
-#endif  // !defined(OS_WIN)
 }
 
 void TilesDefaultView::ButtonPressed(views::Button* sender,
@@ -121,11 +116,9 @@ void TilesDefaultView::ButtonPressed(views::Button* sender,
     shell->system_tray_controller()->ShowHelp();
   } else if (sender == lock_button_) {
     shell->RecordUserMetricsAction(UMA_TRAY_LOCK_SCREEN);
-#if defined(OS_CHROMEOS)
     chromeos::DBusThreadManager::Get()
         ->GetSessionManagerClient()
         ->RequestLockScreen();
-#endif
   } else if (sender == power_button_) {
     shell->RecordUserMetricsAction(UMA_TRAY_SHUT_DOWN);
     shell->RequestShutdown();