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

ash/common/system/date/tray_date.cc

Index: ash/common/system/date/tray_date.cc
diff --git a/ash/common/system/date/tray_date.cc b/ash/common/system/date/tray_date.cc
index 3b1a67e2d2f32351762f54dd938c2eb48ab06f5c..7b1b909f463dea929e97b67ed1bfceef3076c5a5 100644
--- a/ash/common/system/date/tray_date.cc
+++ b/ash/common/system/date/tray_date.cc
@@ -5,6 +5,7 @@
 #include "ash/common/system/date/tray_date.h"
 
 #include "ash/common/shelf/wm_shelf_util.h"
+#include "ash/common/system/chromeos/system_clock_observer.h"
 #include "ash/common/system/date/date_default_view.h"
 #include "ash/common/system/date/date_view.h"
 #include "ash/common/system/tray/system_tray.h"
@@ -12,10 +13,6 @@
 #include "ash/common/system/tray/tray_item_view.h"
 #include "ash/common/wm_shell.h"
 
-#if defined(OS_CHROMEOS)
-#include "ash/common/system/chromeos/system_clock_observer.h"
-#endif
-
 namespace ash {
 
 TrayDate::TrayDate(SystemTray* system_tray)
@@ -23,9 +20,7 @@ TrayDate::TrayDate(SystemTray* system_tray)
       time_tray_(NULL),
       default_view_(NULL),
       login_status_(LoginStatus::NOT_LOGGED_IN) {
-#if defined(OS_CHROMEOS)
   system_clock_observer_.reset(new SystemClockObserver());

[James Cook, 2016/12/20 00:02:24]

nit: move into constructor initializer list

[Evan Stade, 2016/12/20 18:25:21]

Done.

-#endif
   WmShell::Get()->system_tray_notifier()->AddClockObserver(this);
 }
 
@@ -66,12 +61,10 @@ views::View* TrayDate::CreateTrayView(LoginStatus status) {
 views::View* TrayDate::CreateDefaultView(LoginStatus status) {
   default_view_ = new DateDefaultView(this, status);
 
-#if defined(OS_CHROMEOS)
   // Save the login status we created the view with.
   login_status_ = status;
 
   OnSystemClockCanSetTimeChanged(system_clock_observer_->can_set_time());
-#endif
   return default_view_;
 }