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

chromeos/ime/component_extension_ime_manager.h

Index: chromeos/ime/component_extension_ime_manager.h
diff --git a/chromeos/ime/component_extension_ime_manager.h b/chromeos/ime/component_extension_ime_manager.h
index 54156ff07f505050626bc6801fe547d5e9cce26d..8d7975820e9797501dc1b6661302e81ca339d2dc 100644
--- a/chromeos/ime/component_extension_ime_manager.h
+++ b/chromeos/ime/component_extension_ime_manager.h
@@ -5,6 +5,8 @@
 #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"
@@ -122,6 +124,9 @@ class CHROMEOS_EXPORT ComponentExtensionIMEManager {
   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_;
@@ -130,6 +135,8 @@ class CHROMEOS_EXPORT ComponentExtensionIMEManager {
 
   bool is_initialized_;
 
+  std::set<std::string> login_layout_set_;
+
   DISALLOW_COPY_AND_ASSIGN(ComponentExtensionIMEManager);
 };