Switch to standard integer types in ash/.

ash/system/chromeos/tray_display.h

Index: ash/system/chromeos/tray_display.h
diff --git a/ash/system/chromeos/tray_display.h b/ash/system/chromeos/tray_display.h
index 08309cea2302ec155a0a057208746c674c8764c7..7712b69a58fd673acadb8bd0c1edfe66bd1dfe57 100644
--- a/ash/system/chromeos/tray_display.h
+++ b/ash/system/chromeos/tray_display.h
@@ -5,12 +5,15 @@
 #ifndef ASH_SYSTEM_CHROMEOS_TRAY_DISPLAY_H_
 #define ASH_SYSTEM_CHROMEOS_TRAY_DISPLAY_H_
 
+#include <stdint.h>
+
 #include <map>
 
 #include "ash/ash_export.h"
 #include "ash/display/display_info.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/system/tray/system_tray_item.h"
+#include "base/macros.h"
 #include "base/strings/string16.h"
 #include "ui/views/view.h"
 
@@ -33,7 +36,7 @@ class ASH_EXPORT TrayDisplay : public SystemTrayItem,
  private:
   friend class TrayDisplayTest;
 
-  typedef std::map<int64, DisplayInfo> DisplayInfoMap;
+  typedef std::map<int64_t, DisplayInfo> DisplayInfoMap;
 
   static const char kNotificationId[];