Moving input device hotplug event processing outside of ui/display

ui/display/chromeos/x11/native_display_delegate_x11.h

Index: ui/display/chromeos/x11/native_display_delegate_x11.h
diff --git a/ui/display/chromeos/x11/native_display_delegate_x11.h b/ui/display/chromeos/x11/native_display_delegate_x11.h
index 76a84f4512db0b17100cf4dcfafec685f3ca3e93..ce569883a2516bb88c4b02eeee06aea0235f65ad 100644
--- a/ui/display/chromeos/x11/native_display_delegate_x11.h
+++ b/ui/display/chromeos/x11/native_display_delegate_x11.h
@@ -41,7 +41,6 @@ namespace ui {
 
 class DisplayModeX11;
 class DisplaySnapshotX11;
-class InputDeviceEventObserver;
 class NativeDisplayEventDispatcherX11;
 
 class DISPLAY_EXPORT NativeDisplayDelegateX11 : public NativeDisplayDelegate {
@@ -149,9 +148,6 @@ class DISPLAY_EXPORT NativeDisplayDelegateX11 : public NativeDisplayDelegate {
   // |observers_| when a display change has occurred.
   scoped_ptr<NativeDisplayEventDispatcherX11> platform_event_dispatcher_;
 
-  // Processes X11 display events that have no X11 window associated with it.
-  scoped_ptr<InputDeviceEventObserver> input_hotplug_observer_;
-
   // List of observers waiting for display configuration change events.
   ObserverList<NativeDisplayObserver> observers_;