Fix crash on key events in touchview.

ash/wm/maximize_mode/internal_input_device_list_x11.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 "ash/wm/maximize_mode/internal_input_device_list_x11.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/Xlib.h>
 
 #include "base/strings/string_util.h"
@@ skipping 26 matching lines @@
         internal_device_ids_.insert(xi_dev_list[i].deviceid);
     }
   }
 }
 
 InternalInputDeviceListX11::~InternalInputDeviceListX11() {
 }
 
 bool InternalInputDeviceListX11::IsEventFromInternalDevice(
     const ui::Event* event) {
-  if (!event->HasNativeEvent())
+  if (!event->HasNativeEvent() ||
+      event->native_event()->type != GenericEvent) {
     return false;
+  }
+
   XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(
       event->native_event()->xcookie.data);
   return internal_device_ids_.find(xiev->sourceid) !=
       internal_device_ids_.end();
 }
 
 }  // namespace ash