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

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

 // Copyright (c) 2012 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 "base/lazy_instance.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/common/extensions/api/input_ime.h"
 #include "content/public/browser/notification_registrar.h"
@@ skipping 384 matching lines @@
     extensions::InputImeEventRouterFactory::GetInstance()->RemoveProfile(
         content::Source<Profile>(source).ptr());
   }
 }
 
 InputImeAPI::~InputImeAPI() {
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
   registrar_.RemoveAll();
 }
 
-void InputImeAPI::OnListenerAdded(const EventListenerInfo& details) {
-  if (!details.browser_context)
-    return;
-  InputImeEventRouter* event_router =
-      GetInputImeEventRouter(Profile::FromBrowserContext(
-          Profile::FromBrowserContext(details.browser_context)));
-  InputMethodEngineBase* engine =
-      event_router ? event_router->GetActiveEngine(details.extension_id)
-                   : nullptr;
-
-  // Notifies the IME extension for IME ready with onActivate/onFocus events.
-  if (engine)
-    engine->Enable(engine->GetActiveComponentId());
-}
-
 static base::LazyInstance<BrowserContextKeyedAPIFactory<InputImeAPI> >
     g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 BrowserContextKeyedAPIFactory<InputImeAPI>* InputImeAPI::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 InputImeEventRouter* GetInputImeEventRouter(Profile* profile) {
   if (!profile)
     return nullptr;
   if (profile->HasOffTheRecordProfile())
     profile = profile->GetOffTheRecordProfile();
   return extensions::InputImeEventRouterFactory::GetInstance()->GetRouter(
       profile);
 }
 
 }  // namespace extensions