Revise ui::DomKey to unify character and non-character codes.

ui/events/ozone/evdev/keyboard_evdev.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/ozone/evdev/keyboard_evdev.h"
 
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
@@ skipping 194 matching lines @@
                                 bool repeat,
                                 base::TimeDelta timestamp,
                                 int device_id) {
   DomCode dom_code =
       KeycodeConverter::NativeKeycodeToDomCode(EvdevCodeToNativeCode(key));
   if (dom_code == DomCode::DOM_CODE_NONE)
     return;
   int flags = modifiers_->GetModifierFlags();
   DomKey dom_key;
   KeyboardCode key_code;
-  uint16 character;
   uint32 platform_keycode = 0;
-  if (!keyboard_layout_engine_->Lookup(dom_code, flags, &dom_key, &character,
+  if (!keyboard_layout_engine_->Lookup(dom_code, flags, &dom_key,
                                        &key_code, &platform_keycode)) {
     return;
   }
   if (!repeat) {
     int flag = ModifierDomKeyToEventFlag(dom_key);
     UpdateModifier(flag, down);
   }
 
   KeyEvent event(down ? ET_KEY_PRESSED : ET_KEY_RELEASED, key_code, dom_code,
-                 modifiers_->GetModifierFlags(), dom_key, character, timestamp);
+                 modifiers_->GetModifierFlags(), dom_key, timestamp);
   event.set_source_device_id(device_id);
   if (platform_keycode)
     event.set_platform_keycode(platform_keycode);
   callback_.Run(&event);
 }
 }  // namespace ui