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

chrome/browser/chromeos/input_method/input_method_engine_ibus.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_ENGINE_IBUS_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_ENGINE_IBUS_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
  public:
   InputMethodEngineIBus();
 
   virtual ~InputMethodEngineIBus();
 
   void 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);
 
   // InputMethodEngine overrides.
   virtual void StartIme() OVERRIDE;
   virtual bool SetComposition(int context_id,
                               const char* text,
                               int selection_start,
                               int selection_end,
                               int cursor,
                               const std::vector<SegmentInfo>& segments,
                               std::string* error) OVERRIDE;
@@ skipping 86 matching lines @@
   // Mapping of candidate id to index.
   std::map<int, int> candidate_indexes_;
 
   // Used for input view window.
   GURL input_view_url_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_ENGINE_IBUS_H_