ozone: xkb: Fix number pad key mappings

ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h

 // 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.
 
 #ifndef UI_EVENTS_OZONE_LAYOUT_XKB_XKB_KEYBOARD_LAYOUT_ENGINE_H_
 #define UI_EVENTS_OZONE_LAYOUT_XKB_XKB_KEYBOARD_LAYOUT_ENGINE_H_
 
 #include <xkbcommon/xkbcommon.h>
 
 #include "base/containers/hash_tables.h"
@@ skipping 27 matching lines @@
               uint32* platform_keycode) const override;
 
  protected:
   // Table for EventFlagsToXkbFlags().
   struct XkbFlagMapEntry {
     int ui_flag;
     xkb_mod_mask_t xkb_flag;
   };
   std::vector<XkbFlagMapEntry> xkb_flag_map_;
 
+  // Flag mask for num lock, which is always considered enabled.
+  xkb_mod_mask_t num_lock_mod_mask_;
+
   // Determines the Windows-based KeyboardCode (VKEY) for a character key,
   // accounting for non-US layouts. May return VKEY_UNKNOWN, in which case the
   // caller should use |DomCodeToNonLocatedKeyboardCode()| as a last resort.
   KeyboardCode DifficultKeyboardCode(DomCode dom_code,
                                      int ui_flags,
                                      xkb_keycode_t xkb_keycode,
                                      xkb_mod_mask_t xkb_flags,
                                      xkb_keysym_t xkb_keysym,
                                      DomKey dom_key,
                                      base::char16 character) const;
@@ skipping 26 matching lines @@
 
   // libxkbcommon uses explicit reference counting for its structures,
   // so we need to trigger its cleanup.
   scoped_ptr<xkb_context, XkbContextDeleter> xkb_context_;
   scoped_ptr<xkb_state, XkbStateDeleter> xkb_state_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_LAYOUT_XKB_XKB_KEYBOARD_LAYOUT_ENGINE_H_