Make InputMethodEngine manage its descriptor.

chrome/browser/extensions/api/input_ime/input_ime_api.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_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/singleton.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/input_method/input_method_engine_interface.h"
 #include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/extension_function.h"
 #include "extensions/common/extension.h"
 
 class Profile;
 
 namespace chromeos {
 class InputMethodEngineInterface;
 class ImeObserver;
-}
+}  // namespace chromeos
 
 namespace extensions {
 struct InputComponentInfo;
 
 class InputImeEventRouter {
  public:
   static InputImeEventRouter* GetInstance();
 
   bool RegisterIme(Profile* profile,
                    const std::string& extension_id,
@@ skipping 199 matching lines @@
   }
   static const bool kServiceIsNULLWhileTesting = true;
 
   Profile* const profile_;
   content::NotificationRegistrar registrar_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_INPUT_IME_INPUT_IME_API_H_