Implement ComplexFeature to support permission features with multiple rules.

chrome/common/extensions/extension.cc

 // 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.
 
 #include "chrome/common/extensions/extension.h"
 
 #include <ostream>
 
 #include "base/base64.h"
 #include "base/basictypes.h"
@@ skipping 739 matching lines @@
     // associated with them are available because the feature system does not
     // know about aliases.
 
     std::vector<std::string> host_data;
     if (!APIPermissionSet::ParseFromJSON(permissions, api_permissions,
                                          error, &host_data))
       return false;
 
     // Verify feature availability of permissions.
     std::vector<APIPermission::ID> to_remove;
-    SimpleFeatureProvider* permission_features =
+    FeatureProvider* permission_features =
         SimpleFeatureProvider::GetPermissionFeatures();
     for (APIPermissionSet::const_iterator it = api_permissions->begin();
          it != api_permissions->end(); ++it) {
       extensions::Feature* feature =
           permission_features->GetFeature(it->name());
 
       // The feature should exist since we just got an APIPermission
       // for it. The two systems should be updated together whenever a
       // permission is added.
       CHECK(feature);
@@ skipping 3449 matching lines @@
 
 UpdatedExtensionPermissionsInfo::UpdatedExtensionPermissionsInfo(
     const Extension* extension,
     const PermissionSet* permissions,
     Reason reason)
     : reason(reason),
       extension(extension),
       permissions(permissions) {}
 
 }   // namespace extensions