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

chrome/browser/chrome_browser_main_extra_parts_exo.cc

Index: chrome/browser/chrome_browser_main_extra_parts_exo.cc
diff --git a/chrome/browser/chrome_browser_main_extra_parts_exo.cc b/chrome/browser/chrome_browser_main_extra_parts_exo.cc
index af9342b4f2fb93cba1fcde390d7be4eaa7fea04a..8f4e277d902c2a89474cfb8e1b209f92f34868c3 100644
--- a/chrome/browser/chrome_browser_main_extra_parts_exo.cc
+++ b/chrome/browser/chrome_browser_main_extra_parts_exo.cc
@@ -90,7 +90,8 @@ class ChromeBrowserMainExtraPartsExo::WaylandWatcher {
 class ChromeBrowserMainExtraPartsExo::WaylandWatcher
     : public base::MessagePumpLibevent::Watcher {
  public:
-  explicit WaylandWatcher(exo::wayland::Server* server) : server_(server) {
+  explicit WaylandWatcher(exo::wayland::Server* server)
+      : controller_(FROM_HERE), server_(server) {
     base::MessageLoopForUI::current()->WatchFileDescriptor(
         server_->GetFileDescriptor(),
         true,  // persistent