Add decoration to the language button to indicate that a third party IME is in use

chrome/browser/chromeos/input_method/input_method_manager_impl.cc

Index: chrome/browser/chromeos/input_method/input_method_manager_impl.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_manager_impl.cc b/chrome/browser/chromeos/input_method/input_method_manager_impl.cc
index 0bdff65613d68a8cd657cd1ed54025e92d38bf4e..7f6d37d081eeb65f3afc239a20c35093fc6227c0 100644
--- a/chrome/browser/chromeos/input_method/input_method_manager_impl.cc
+++ b/chrome/browser/chromeos/input_method/input_method_manager_impl.cc
@@ -303,7 +303,8 @@ void InputMethodManagerImpl::AddInputMethodExtension(
   }
 
   const std::string layout = layouts.empty() ? "" : layouts[0];
-  extra_input_methods_[id] = InputMethodDescriptor(id, name, layout, language);
+  extra_input_methods_[id] =
+      InputMethodDescriptor(id, name, layout, language, true);
 
   if (!Contains(active_input_method_ids_, id)) {
     active_input_method_ids_.push_back(id);