Extract Extension IME related utility.

chrome/browser/chromeos/input_method/input_method_engine.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_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_ENGINE_H_
 
 #include <string>
 #include <vector>
 
 namespace chromeos {
 
 namespace input_method {
 struct KeyEventHandle;
 }  // namespace input_method
 
-extern const char* kExtensionImePrefix;
-
 // InputMethodEngine is used to translate from the Chrome IME API to the native
 // API.
 class InputMethodEngine {
  public:
   struct KeyboardEvent {
     KeyboardEvent();
     virtual ~KeyboardEvent();
 
     std::string type;
     std::string key;
@@ skipping 193 matching lines @@
       const char* engine_id,
       const char* description,
       const char* language,
       const std::vector<std::string>& layouts,
       std::string* error);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_ENGINE_H_