Consolidate manifest handler registration.

chrome/browser/extensions/api/file_handlers/file_handlers_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_FILE_HANDLERS_FILE_HANDLERS_API_H_
-#define CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_FILE_HANDLERS_API_H_
-
-#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
-
-class Profile;
-
-namespace extensions {
-
-class FileHandlersAPI : public ProfileKeyedAPI {
- public:
-  explicit FileHandlersAPI(Profile* profile);
-  virtual ~FileHandlersAPI();
-
-  // ProfileKeyedAPI implementation.
-  static ProfileKeyedAPIFactory<FileHandlersAPI>* GetFactoryInstance();
-
- private:
-  friend class ProfileKeyedAPIFactory<FileHandlersAPI>;
-
-  // ProfileKeyedAPI implementation.
-  static const char* service_name() {
-    return "FileHandlersAPI";
-  }
-  static const bool kServiceIsNULLWhileTesting = true;
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_FILE_HANDLERS_API_H_