Turning ui/events/ipc into a source_set

ui/events/ipc/latency_info_param_traits.h

Index: ui/events/ipc/latency_info_param_traits.h
diff --git a/ui/events/ipc/latency_info_param_traits.h b/ui/events/ipc/latency_info_param_traits.h
index 83f6a3147be8f6b916fd4693cdb79ee106ce771a..720b77ea17971d0d9184c6038c91b22ab9d6e000 100644
--- a/ui/events/ipc/latency_info_param_traits.h
+++ b/ui/events/ipc/latency_info_param_traits.h
@@ -6,12 +6,11 @@
 #define UI_EVENTS_IPC_LATENCY_INFO_PARAM_TRAITS_H_
 
 #include "base/pickle.h"
-#include "ui/events/ipc/events_ipc_export.h"
 #include "ui/events/latency_info.h"
 
 namespace IPC {
 template <>
-struct EVENTS_IPC_EXPORT ParamTraits<ui::LatencyInfo> {
+struct ParamTraits<ui::LatencyInfo> {
   typedef ui::LatencyInfo param_type;
   static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);