ozone: evdev: Add a couple more trace events

ui/events/ozone/evdev/touch_event_converter_evdev.cc

Index: ui/events/ozone/evdev/touch_event_converter_evdev.cc
diff --git a/ui/events/ozone/evdev/touch_event_converter_evdev.cc b/ui/events/ozone/evdev/touch_event_converter_evdev.cc
index 5b7b2596f97f7c2c3ecada4f7a84165dba014af3..2427f894d3a591d4c86152c8b8918fd559417326 100644
--- a/ui/events/ozone/evdev/touch_event_converter_evdev.cc
+++ b/ui/events/ozone/evdev/touch_event_converter_evdev.cc
@@ -23,6 +23,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/trace_event/trace_event.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/events/devices/device_util_linux.h"
 #include "ui/events/event.h"
@@ -214,6 +215,10 @@ void TouchEventConverterEvdev::OnStopped() {
 }
 
 void TouchEventConverterEvdev::OnFileCanReadWithoutBlocking(int fd) {
+  TRACE_EVENT1("evdev",
+               "TouchEventConverterEvdev::OnFileCanReadWithoutBlocking", "fd",
+               fd);
+
   input_event inputs[kNumTouchEvdevSlots * 6 + 1];
   ssize_t read_size = read(fd, inputs, sizeof(inputs));
   if (read_size < 0) {