Distinguish between keystroke and character events.

ui/events/x/events_x.cc

 // Copyright (c) 2012 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/event_constants.h"
 
 #include <cmath>
 #include <string.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
@@ skipping 604 matching lines @@
     default:
       NOTREACHED();
       break;
   }
   KeySym keysym = XK_VoidSymbol;
   if (xkey)
     XLookupString(xkey, NULL, 0, &keysym, NULL);
   return keysym;
 }
 
+bool IsCharFromNative(const base::NativeEvent& native_event) {
+  return false;
+}
+
 int GetChangedMouseButtonFlagsFromNative(
     const base::NativeEvent& native_event) {
   switch (native_event->type) {
     case ButtonPress:
     case ButtonRelease:
       return GetEventFlagsFromXState(native_event->xbutton.state);
     case GenericEvent: {
       XIDeviceEvent* xievent =
           static_cast<XIDeviceEvent*>(native_event->xcookie.data);
       switch (xievent->evtype) {
@@ skipping 178 matching lines @@
     start_time = &start_time_;
   if (!end_time)
     end_time = &end_time_;
 
   DeviceDataManagerX11::GetInstance()->GetGestureTimes(
       native_event, start_time, end_time);
   return true;
 }
 
 }  // namespace ui