Add a centralized mechanism for whitelisting access to extension permissions.

chrome/browser/extensions/api/terminal/terminal_extension_helper.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_TERMINAL_TERMINAL_EXTENSION_HELPER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TERMINAL_TERMINAL_EXTENSION_HELPER_H_
 #pragma once
 
 #include <string>
 
 #include "googleurl/src/gurl.h"
 
+class Extension;
 class Profile;
 
 class TerminalExtensionHelper {
  public:
-  // Checks if the extension whose id is |extension_id| is allowed to access
-  // terminalPrivate API.
-  static bool AllowAccessToExtension(Profile* profile,
-                                     const std::string& extension_id);
   // Returns Hterm extension's entry point for Crosh. If no HTerm extension is
   // installed, returns empty url.
   static GURL GetCroshExtensionURL(Profile* profile);
-
- private:
-  // Returns id of installed HTerm extension (if any), or NULL.
-  static const char* GetTerminalExtensionId(Profile* profile);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TERMINAL_TERMINAL_EXTENSION_HELPER_H_