Revert of Move LatencyInfo to ui/latency_info

ui/events/ipc/latency_info_param_traits.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_EVENTS_IPC_LATENCY_INFO_PARAM_TRAITS_H_
+#define UI_EVENTS_IPC_LATENCY_INFO_PARAM_TRAITS_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> {
+  typedef ui::LatencyInfo param_type;
+  static void Write(base::Pickle* m, const param_type& p);
+  static bool Read(const base::Pickle* m,
+                   base::PickleIterator* iter,
+                   param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+}  // namespace IPC
+
+#endif // UI_EVENTS_IPC_LATENCY_INFO_PARAM_TRAITS_H_