Extensions: Make it possible for permission parsing code to return a detailed error message.

chrome/common/extensions/permissions/bluetooth_permission.h

 // Copyright 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 CHROME_COMMON_EXTENSIONS_PERMISSIONS_BLUETOOTH_PERMISSION_H_
 #define CHROME_COMMON_EXTENSIONS_PERMISSIONS_BLUETOOTH_PERMISSION_H_
 
 #include <string>
 
 #include "chrome/common/extensions/permissions/bluetooth_permission_data.h"
@@ skipping 14 matching lines @@
       : uuid(uuid) {}
     const std::string uuid;
   };
 
   explicit BluetoothPermission(const APIPermissionInfo* info);
   virtual ~BluetoothPermission();
 
   // SetDisjunctionPermission overrides.
   // BluetoothPermission permits an empty list for gaining permission to the
   // Bluetooth APIs without implementing a profile.
-  virtual bool FromValue(const base::Value* value) OVERRIDE;
+  virtual bool FromValue(const base::Value* value,
+                         std::string* error) OVERRIDE;
 
   // APIPermission overrides
   virtual PermissionMessages GetMessages() const OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_PERMISSIONS_BLUETOOTH_PERMISSION_H_