Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/platform/x11/x11_event_source.h

Index: ui/events/platform/x11/x11_event_source.h
diff --git a/ui/events/platform/x11/x11_event_source.h b/ui/events/platform/x11/x11_event_source.h
index 6501eb780ba9fc4aa5d04f8b271b4cf3cdbb708f..d91fefe149b3da8bbd02adfa676cf128db8e21ae 100644
--- a/ui/events/platform/x11/x11_event_source.h
+++ b/ui/events/platform/x11/x11_event_source.h
@@ -17,7 +17,7 @@ typedef unsigned long XID;
 
 namespace ui {
 
-class HotplugEventHandlerX11;
+class X11HotplugEventHandler;
 
 // A PlatformEventSource implementation for reading events from X11 server and
 // dispatching the events to the appropriate dispatcher.
@@ -50,6 +50,7 @@ class EVENTS_EXPORT X11EventSource : public PlatformEventSource {
   // PlatformEventSource:
   uint32_t DispatchEvent(XEvent* xevent) override;
   void StopCurrentEventStream() override;
+  void OnDispatcherListChanged() override;
 
   // The connection to the X11 server used to receive the events.
   XDisplay* display_;
@@ -58,7 +59,7 @@ class EVENTS_EXPORT X11EventSource : public PlatformEventSource {
   // available events.
   bool continue_stream_;
 
-  scoped_ptr<HotplugEventHandlerX11> hotplug_event_handler_;
+  scoped_ptr<X11HotplugEventHandler> hotplug_event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(X11EventSource);
 };