Delete InputMethodEngine::CreateEngine and call the InputMethodEngineIBus contructor directly.

chrome/browser/chromeos/input_method/input_method_engine_ibus.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/chromeos/input_method/input_method_engine_ibus.h"
 
 #define XK_MISCELLANY
 #include <X11/keysymdef.h>
 #include <X11/X.h>
 #include <X11/Xlib.h>
@@ skipping 68 matching lines @@
   // TODO(komatsu): Move this logic to InputMethodManager.
   if (IBusBridge::Get()->GetEngineHandler() == this)
     IBusBridge::Get()->SetEngineHandler(NULL);
 }
 
 void InputMethodEngineIBus::Initialize(
     InputMethodEngine::Observer* observer,
     const char* engine_name,
     const char* extension_id,
     const char* engine_id,
-    const char* description,
     const std::vector<std::string>& languages,
     const std::vector<std::string>& layouts,
     const GURL& options_page,
-    const GURL& input_view,
-    std::string* error) {
+    const GURL& input_view) {
   DCHECK(observer) << "Observer must not be null.";
 
   observer_ = observer;
   engine_id_ = engine_id;
 
   input_method::InputMethodManager* manager =
       input_method::InputMethodManager::Get();
   ComponentExtensionIMEManager* comp_ext_ime_manager
       = manager->GetComponentExtensionIMEManager();
 
@@ skipping 474 matching lines @@
           // TODO(nona): Implement it.
           break;
       }
     }
   }
 
   // TODO(nona): Support item.children.
 }
 
 }  // namespace chromeos