Aura needs event translation for Mac

base/event_types.h

Index: base/event_types.h
diff --git a/base/event_types.h b/base/event_types.h
index a1b78f6db2cff8fd72e9f2434bede7662aa04ccd..ed0f02ff90c32bdf1f88318bafea9bc7e5b6bae5 100644
--- a/base/event_types.h
+++ b/base/event_types.h
@@ -18,6 +18,12 @@ union WaylandEvent;
 }
 #elif defined(USE_X11)
 typedef union _XEvent XEvent;
+#elif defined(OS_MACOSX)
+#if defined(__OBJC__)
+@class NSEvent;
+#else  // __OBJC__
+class NSEvent;
+#endif // __OBJC__
 #endif
 
 namespace base {
@@ -29,6 +35,8 @@ typedef MSG NativeEvent;
 typedef wayland::WaylandEvent* NativeEvent;
 #elif defined(USE_X11)
 typedef XEvent* NativeEvent;
+#elif defined(OS_MACOSX)
+typedef NSEvent* NativeEvent;
 #else
 typedef void* NativeEvent;
 #endif