IPC::ParamTraits for ui::Event (towards ui::Events over mojo IPC)

ui/events/events.gyp

Index: ui/events/events.gyp
diff --git a/ui/events/events.gyp b/ui/events/events.gyp
index 4a9d4711832bb650c01601001fb3f8d538b65740..449c09b37c8c9af0975b17ea33ccb7700615e4a1 100644
--- a/ui/events/events.gyp
+++ b/ui/events/events.gyp
@@ -310,8 +310,12 @@
         'EVENTS_IPC_IMPLEMENTATION',
       ],
       'sources': [
+        'ipc/event_param_traits.cc',
+        'ipc/event_param_traits.h',
+        'ipc/event_param_traits_macros.h',
         'ipc/latency_info_param_traits.cc',
         'ipc/latency_info_param_traits.h',
+        'ipc/latency_info_param_traits_macros.h',
       ],
     },
     {
@@ -388,4 +392,4 @@
       ],
     }],
   ],
-}
+}