Fix out of order key events in Chrome on Linux.

ui/events/platform/x11/x11_event_source.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.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/X.h>
 #include <X11/Xlib.h>
 #include <X11/XKBlib.h>
@@ skipping 89 matching lines @@
   // It may be useful to eventually align this event dispatch with vsync, but
   // not yet.
   continue_stream_ = true;
   while (XPending(display_) && continue_stream_) {
     XEvent xevent;
     XNextEvent(display_, &xevent);
     ExtractCookieDataDispatchEvent(&xevent);
   }
 }
 
+void X11EventSource::DispatchEventNow(XEvent* event) {
+  ExtractCookieDataDispatchEvent(event);
+}
+
 void X11EventSource::BlockUntilWindowMapped(XID window) {
   XEvent event;
   do {
     // Block until there's a message of |event_mask| type on |w|. Then remove
     // it from the queue and stuff it in |event|.
     XWindowEvent(display_, window, StructureNotifyMask, &event);
     ExtractCookieDataDispatchEvent(&event);
   } while (event.type != MapNotify);
 }
 
@@ skipping 28 matching lines @@
 
 void X11EventSource::OnDispatcherListChanged() {
   if (!hotplug_event_handler_) {
     hotplug_event_handler_.reset(new X11HotplugEventHandler());
     // Force the initial device query to have an update list of active devices.
     hotplug_event_handler_->OnHotplugEvent();
   }
 }
 
 }  // namespace ui