Clean up useless code in InputMethodManagerImpl.

chrome/browser/chromeos/input_method/input_method_manager_impl.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_MANAGER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 185 matching lines @@
   // that |util_| is required to initialize |keyboard_|.
   InputMethodUtil util_;
 
   // An object which provides component extension ime management functions.
   scoped_ptr<ComponentExtensionIMEManager> component_extension_ime_manager_;
 
   // An object for switching XKB layouts and keyboard status like caps lock and
   // auto-repeat interval.
   scoped_ptr<ImeKeyboard> keyboard_;
 
-  base::ThreadChecker thread_checker_;
-
-  base::WeakPtrFactory<InputMethodManagerImpl> weak_ptr_factory_;
-
   // The engine map from extension_id to an engine.
   std::map<std::string, InputMethodEngineInterface*> engine_map_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodManagerImpl);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_IMPL_H_