Unknown options in extension manifest file are silently ignored

chrome/common/extensions/extension.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_COMMON_EXTENSIONS_EXTENSION_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 505 matching lines @@
 
   // Returns the sync bucket to use for this extension.
   SyncType GetSyncType() const;
 
   // Returns true if the extension should be synced.
   bool IsSyncable() const;
 
   // Returns true if the extension should be displayed in the launcher.
   bool ShouldDisplayInLauncher() const;
 
+  // Gets the list of unrecognized keys in the manifest, if any.
+  // Unrecognized keys are filled in when Manifest::ValidateManifest is called.

[not at google - send to devlin, 2012/04/09 13:01:54]

Why need this method?  Seems adequate to call
manifest()->HasUnrecognizedManifestKeys().

+  bool HasUnrecognizedManifestKeys(
+      const std::vector<const std::string*>** unrecognized_keys) const;
+
   // Accessors:
 
   const FilePath& path() const { return path_; }
   const GURL& url() const { return extension_url_; }
   Location location() const;
   const std::string& id() const;
   const Version* version() const { return version_.get(); }
   const std::string VersionString() const;
   const std::string& name() const { return name_; }
   const std::string public_key() const { return public_key_; }
@@ skipping 534 matching lines @@
   // only contain the removed permissions.
   const ExtensionPermissionSet* permissions;
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const ExtensionPermissionSet* permissions,
       Reason reason);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_