Implement GLX for Ozone X11.

ui/events/platform/x11/x11_event_source_libevent.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/platform/x11/x11_event_source_libevent.h"
 
 #include <X11/Xlib.h>
 #include <X11/extensions/XInput2.h>
 
 #include "base/message_loop/message_loop.h"
@@ skipping 118 matching lines @@
 
 }  // namespace
 
 X11EventSourceLibevent::X11EventSourceLibevent(XDisplay* display)
     : event_source_(this, display) {
   AddEventWatcher();
 }
 
 X11EventSourceLibevent::~X11EventSourceLibevent() {}
 
+// static
+X11EventSourceLibevent* X11EventSourceLibevent::GetInstance() {
+  return static_cast<X11EventSourceLibevent*>(
+      PlatformEventSource::GetInstance());
+}
+
 void X11EventSourceLibevent::AddXEventDispatcher(XEventDispatcher* dispatcher) {
   dispatchers_xevent_.AddObserver(dispatcher);
 }
 
 void X11EventSourceLibevent::RemoveXEventDispatcher(
     XEventDispatcher* dispatcher) {
   dispatchers_xevent_.RemoveObserver(dispatcher);
 }
 
 void X11EventSourceLibevent::ProcessXEvent(XEvent* xevent) {
@@ skipping 41 matching lines @@
 
 void X11EventSourceLibevent::OnFileCanReadWithoutBlocking(int fd) {
   event_source_.DispatchXEvents();
 }
 
 void X11EventSourceLibevent::OnFileCanWriteWithoutBlocking(int fd) {
   NOTREACHED();
 }
 
 }  // namespace ui