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

ui/ozone/platform/wayland/fake_server.cc

 // Copyright 2016 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/ozone/platform/wayland/fake_server.h"
 
 #include <sys/socket.h>
 #include <wayland-server.h>
 #include <xdg-shell-unstable-v5-server-protocol.h>
 
@@ skipping 337 matching lines @@
 
 void DisplayDeleter::operator()(wl_display* display) {
   wl_display_destroy(display);
 }
 
 FakeServer::FakeServer()
     : Thread("fake_wayland_server"),
       pause_event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
                    base::WaitableEvent::InitialState::NOT_SIGNALED),
       resume_event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
-                    base::WaitableEvent::InitialState::NOT_SIGNALED) {}
+                    base::WaitableEvent::InitialState::NOT_SIGNALED),
+      controller_(FROM_HERE) {}
 
 FakeServer::~FakeServer() {
   Resume();
   Stop();
 }
 
 bool FakeServer::Start() {
   display_.reset(wl_display_create());
   if (!display_)
     return false;
@@ skipping 59 matching lines @@
 }
 
 void FakeServer::OnFileCanReadWithoutBlocking(int fd) {
   wl_event_loop_dispatch(event_loop_, 0);
   wl_display_flush_clients(display_.get());
 }
 
 void FakeServer::OnFileCanWriteWithoutBlocking(int fd) {}
 
 }  // namespace wl