Switch to standard integer types in ash/.

ash/system/ime/tray_ime_chromeos.h

Index: ash/system/ime/tray_ime_chromeos.h
diff --git a/ash/system/ime/tray_ime_chromeos.h b/ash/system/ime/tray_ime_chromeos.h
index 8ff1a87f3a234c3d2d01a6afd30d3d71f6736417..7cf60cc822dee11078ffa97772f65daf83048298 100644
--- a/ash/system/ime/tray_ime_chromeos.h
+++ b/ash/system/ime/tray_ime_chromeos.h
@@ -5,11 +5,14 @@
 #ifndef ASH_SYSTEM_IME_TRAY_IME_CHROMEOS_H_
 #define ASH_SYSTEM_IME_TRAY_IME_CHROMEOS_H_
 
+#include <stddef.h>
+
 #include "ash/system/chromeos/virtual_keyboard/virtual_keyboard_observer.h"
 #include "ash/system/ime/ime_observer.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray_accessibility.h"
+#include "base/macros.h"
 
 namespace views {
 class Label;