Remove IPC::ParamTraits for ui::Event.

ui/events/event.cc

 // Copyright (c) 2012 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.
 
 #include "ui/events/event.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 
@@ skipping 965 matching lines @@
           kMaxAutoRepeatTimeMs) {
     last_key_event_->set_time_stamp(event.time_stamp());
     last_key_event_->set_flags(last_key_event_->flags() | ui::EF_IS_REPEAT);
     return true;
   }
   delete last_key_event_;
   last_key_event_ = new KeyEvent(event);
   return false;
 }
 
-KeyEvent::KeyEvent(EventType type, base::TimeDelta time_stamp, int flags)
-    : Event(type, time_stamp, flags) {}
-
 KeyEvent::KeyEvent(const base::NativeEvent& native_event)
     : Event(native_event,
             EventTypeFromNative(native_event),
             EventFlagsFromNative(native_event)),
       key_code_(KeyboardCodeFromNative(native_event)),
       code_(CodeFromNative(native_event)),
       is_char_(IsCharFromNative(native_event)) {
   if (IsRepeated(*this))
     set_flags(flags() | ui::EF_IS_REPEAT);
 
@@ skipping 288 matching lines @@
                    gfx::PointF(x, y),
                    time_stamp,
                    flags | EF_FROM_TOUCH),
       details_(details) {
 }
 
 GestureEvent::~GestureEvent() {
 }
 
 }  // namespace ui