Make Interaction Media Features MQ dynamic on Linux.

ui/events/ozone/evdev/event_converter_evdev.h

Index: ui/events/ozone/evdev/event_converter_evdev.h
diff --git a/ui/events/ozone/evdev/event_converter_evdev.h b/ui/events/ozone/evdev/event_converter_evdev.h
index d9065204c25133d3988af8d37b3b896d6c10798b..76f63fb0b98688fa0439a85ebde57f4d1df611bb 100644
--- a/ui/events/ozone/evdev/event_converter_evdev.h
+++ b/ui/events/ozone/evdev/event_converter_evdev.h
@@ -53,6 +53,8 @@ class EVENTS_OZONE_EVDEV_EXPORT EventConverterEvdev
   // input and can update state but must not dispatch any events to UI.
   void SetEnabled(bool enabled);
 
+  bool IsEnabled() const;
+
   // Cleanup after we stop reading events (release buttons, etc).
   virtual void OnStopped();
 
@@ -129,9 +131,6 @@ class EVENTS_OZONE_EVDEV_EXPORT EventConverterEvdev
   // Whether we're polling for input on the device.
   bool watching_ = false;
 
-  // Whether events should be dispatched to UI.
-  bool enabled_ = false;
-
   // Controller for watching the input fd.
   base::MessagePumpLibevent::FileDescriptorWatcher controller_;