[IME] Removes the duplicated IMEs in chrome://settings/languages, and support async component IMEs …

chrome/browser/chromeos/input_method/input_method_util.h

Index: chrome/browser/chromeos/input_method/input_method_util.h
diff --git a/chrome/browser/chromeos/input_method/input_method_util.h b/chrome/browser/chromeos/input_method/input_method_util.h
index eea2d9e586d496e5760b0195a5b003470946bee6..5f5153f4a382e5d537e4853a8ed97877d0a9d975 100644
--- a/chrome/browser/chromeos/input_method/input_method_util.h
+++ b/chrome/browser/chromeos/input_method/input_method_util.h
@@ -190,7 +190,7 @@ class InputMethodUtil {
   std::map<std::string, std::string> id_to_language_code_;
   InputMethodIdToDescriptorMap id_to_descriptor_;
   XkbIdToDescriptorMap xkb_id_to_descriptor_;
-  ComponentExtIMEMap component_extension_ime_id_to_descriptor_;
+  std::map<std::string, std::string> xkb_layout_to_indicator_;
 
   typedef base::hash_map<std::string, int> HashType;
   HashType english_to_resource_id_;