Notifies the IME extension for IME ready with onActivate/onFocus events at start.

chrome/browser/extensions/api/input_ime/input_ime_api_chromeos.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/extensions/api/input_ime/input_ime_api.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/macros.h"
@@ skipping 612 matching lines @@
       InputComponents::GetInputComponents(extension);
   if (!input_components || input_components->empty())
     return;
   InputImeEventRouter* event_router =
       GetInputImeEventRouter(Profile::FromBrowserContext(browser_context));
   if (event_router) {
     event_router->UnregisterAllImes(extension->id());
   }
 }
 
-void InputImeAPI::OnListenerAdded(const EventListenerInfo& details) {
-  if (!details.browser_context)
-    return;
-  InputMethodEngine* engine =
-      GetActiveEngine(Profile::FromBrowserContext(details.browser_context),
-                      details.extension_id);
-  // Notifies the IME extension for IME ready with onActivate/onFocus events.
-  if (engine)
-    engine->Enable(engine->GetActiveComponentId());
-}
-
 }  // namespace extensions