ozone: Make the evdev implementation a PlatformEventSource.

ui/events/ozone/event_factory_ozone.h

Index: ui/events/ozone/event_factory_ozone.h
diff --git a/ui/events/ozone/event_factory_ozone.h b/ui/events/ozone/event_factory_ozone.h
index 9e0a6b91002087abf50856abf54cee557c566331..80ce12a81b88f42b2a62ecc40342a3f332c0a06b 100644
--- a/ui/events/ozone/event_factory_ozone.h
+++ b/ui/events/ozone/event_factory_ozone.h
@@ -11,7 +11,6 @@
 #include "base/message_loop/message_pump_libevent.h"
 #include "base/task_runner.h"
 #include "ui/events/events_export.h"
-#include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
@@ -27,7 +26,7 @@ class Event;
 // Ozone presumes that the set of file desctiprtors can vary at runtime so this
 // class supports dynamically adding and removing |EventConverterOzone|
 // instances as necessary.
-class EVENTS_EXPORT EventFactoryOzone : public ui::PlatformEventSource {
+class EVENTS_EXPORT EventFactoryOzone {
  public:
   EventFactoryOzone();
   virtual ~EventFactoryOzone();