evdev: Fix infinite loop when devices are unplugged

ui/events/ozone/evdev/event_converter.cc

Index: ui/events/ozone/evdev/event_converter.cc
diff --git a/ui/events/ozone/evdev/event_converter.cc b/ui/events/ozone/evdev/event_converter.cc
index 2454373f9b8409aec9c683c7d56d7b4368cde01a..eea392ded6e4c3770d6ee142a5132398f1616ef9 100644
--- a/ui/events/ozone/evdev/event_converter.cc
+++ b/ui/events/ozone/evdev/event_converter.cc
@@ -19,7 +19,17 @@ EventConverterEvdev::EventConverterEvdev(int fd,
                                          EventModifiersEvdev* modifiers)
     : fd_(fd), path_(path), modifiers_(modifiers) {}
 
-EventConverterEvdev::~EventConverterEvdev() { close(fd_); }
+EventConverterEvdev::~EventConverterEvdev() {
+  Stop();
+  close(fd_);
+}
+
+void EventConverterEvdev::Start() {
+  base::MessagePumpOzone::Current()->WatchFileDescriptor(
+      fd_, true, base::MessagePumpLibevent::WATCH_READ, &controller_, this);
+}
+
+void EventConverterEvdev::Stop() { controller_.StopWatchingFileDescriptor(); }
 
 void EventConverterEvdev::OnFileCanReadWithoutBlocking(int fd) {
   input_event inputs[kEvdevBufferSize];
@@ -28,6 +38,7 @@ void EventConverterEvdev::OnFileCanReadWithoutBlocking(int fd) {
     if (errno == EINTR || errno == EAGAIN)
       return;
     PLOG(ERROR) << "error reading device " << path_.value();
+    Stop();
     return;
   }