Add a KeyboardLayoutEngine::SetCurrentLayoutFromBuffer implementation

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 <stdint.h>
 #include <xkbcommon/xkbcommon.h>
 
@@ skipping 12 matching lines @@
 #include "ui/events/ozone/layout/xkb/xkb_key_code_converter.h"
 
 namespace ui {
 
 class EVENTS_OZONE_LAYOUT_EXPORT XkbKeyboardLayoutEngine
     : public KeyboardLayoutEngine {
  public:
   XkbKeyboardLayoutEngine(const XkbKeyCodeConverter& converter);
   ~XkbKeyboardLayoutEngine() override;
 
-  void SetKeymapFromStringForTest(const char* keymap_string);
-
   // KeyboardLayoutEngine:
   bool CanSetCurrentLayout() const override;
   bool SetCurrentLayoutByName(const std::string& layout_name) override;
+  // Required by Ozone/Wayland (at least) for non ChromeOS builds. See
+  // http://xkbcommon.org/doc/current/md_doc_quick-guide.html for further info.
+  bool SetCurrentLayoutFromString(const std::string& keymap_string) override;
 
   bool UsesISOLevel5Shift() const override;
   bool UsesAltGr() const override;
 
   bool Lookup(DomCode dom_code,
               int flags,
               DomKey* dom_key,
               KeyboardCode* key_code) const override;
 
   static void ParseLayoutName(const std::string& layout_name,
@@ skipping 64 matching lines @@
 
   std::string current_layout_name_;
 
   // Support weak pointers for attach & detach callbacks.
   base::WeakPtrFactory<XkbKeyboardLayoutEngine> weak_ptr_factory_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_LAYOUT_XKB_XKB_KEYBOARD_LAYOUT_ENGINE_H_