Use the location where FileDescriptorWatcher is created to track the libevent handlers

ui/events/ozone/evdev/event_converter_evdev.cc

 // 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.
 
 #include <errno.h>
 #include <linux/input.h>
 #include <stddef.h>
 
 #include "ui/events/ozone/evdev/event_converter_evdev.h"
 
@@ skipping 10 matching lines @@
 
 EventConverterEvdev::EventConverterEvdev(int fd,
                                          const base::FilePath& path,
                                          int id,
                                          InputDeviceType type,
                                          const std::string& name,
                                          uint16_t vendor_id,
                                          uint16_t product_id)
     : fd_(fd),
       path_(path),
-      input_device_(id, type, name, GetInputPathInSys(path), vendor_id,
-                    product_id) {}
+      input_device_(id,
+                    type,
+                    name,
+                    GetInputPathInSys(path),
+                    vendor_id,
+                    product_id),
+      controller_(FROM_HERE) {}
 
 EventConverterEvdev::~EventConverterEvdev() {
   DCHECK(!enabled_);
   DCHECK(!watching_);
 }
 
 void EventConverterEvdev::Start() {
   base::MessageLoopForUI::current()->WatchFileDescriptor(
       fd_, true, base::MessagePumpLibevent::WATCH_READ, &controller_, this);
   watching_ = true;
@@ skipping 109 matching lines @@
 
 base::TimeTicks EventConverterEvdev::TimeTicksFromInputEvent(
     const input_event& event) {
   base::TimeTicks timestamp =
       ui::EventTimeStampFromSeconds(event.time.tv_sec) +
       base::TimeDelta::FromMicroseconds(event.time.tv_usec);
   ValidateEventTimeClock(&timestamp);
   return timestamp;
 }
 }  // namespace ui