Remove PermissionsData::ForExtension() completely

extensions/common/permissions/permissions_data.h

 // Copyright (c) 2013 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 EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_DATA_H_
 #define EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_DATA_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 39 matching lines @@
                                         const UserScript* script,
                                         int process_id,
                                         std::string* error) = 0;
   };
 
   static void SetPolicyDelegate(PolicyDelegate* delegate);
 
   PermissionsData(const Extension* extension);
   virtual ~PermissionsData();
 
-  // Return the PermissionsData associated with the given |extension|.
-  static const PermissionsData* ForExtension(const Extension* extension);
-
   // Returns true if the |extension| can silently increase its permission level.
   // Users must approve permissions for unpacked and packed extensions in the
   // following situations:
   //  - when installing or upgrading packed extensions
   //  - when installing unpacked extensions that have NPAPI plugins
   //  - when either type of extension requests optional permissions
   static bool CanSilentlyIncreasePermissions(const Extension* extension);
 
   // Returns true if the extension is a COMPONENT extension or is on the
   // whitelist of extensions that can script all pages.
@@ skipping 127 matching lines @@
   mutable scoped_refptr<const PermissionSet> active_permissions_unsafe_;
 
   mutable TabPermissionsMap tab_specific_permissions_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionsData);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_DATA_H_