[IME] migrate the xkb ID to extension based xkb ID.

chromeos/ime/component_extension_ime_manager.h

 // Copyright 2013 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 CHROMEOS_IME_COMPONENT_EXTENSION_IME_MANAGER_H_
 #define CHROMEOS_IME_COMPONENT_EXTENSION_IME_MANAGER_H_
 
+#include <set>
+
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/ime/input_method_descriptor.h"
 
 namespace chromeos {
 
 // Represents an engine in component extension IME.
 struct CHROMEOS_EXPORT ComponentExtensionEngine {
@@ skipping 97 matching lines @@
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
  private:
   // Finds ComponentExtensionIME and EngineDescription associated with
   // |input_method_id|. This function retruns true if it is found, otherwise
   // returns false. |out_extension| and |out_engine| can be NULL.
   bool FindEngineEntry(const std::string& input_method_id,
                        ComponentExtensionIME* out_extension,
                        ComponentExtensionEngine* out_engine);
+
+  bool IsInLoginLayoutWhitelist(const std::vector<std::string>& layouts);
+
   scoped_ptr<ComponentExtensionIMEManagerDelegate> delegate_;
 
   std::vector<ComponentExtensionIME> component_extension_imes_;
 
   ObserverList<Observer> observers_;
 
   bool is_initialized_;
 
+  std::set<std::string> login_layout_set_;
+
   DISALLOW_COPY_AND_ASSIGN(ComponentExtensionIMEManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_IME_COMPONENT_EXTENSION_IME_MANAGER_H_