2 files changed, 10 insertions, 7 deletions
diff --git a/ext/js/background/backend.js b/ext/js/background/backend.js
index e94ad065..2368b5d0 100644
--- a/ext/js/background/backend.js
+++ b/ext/js/background/backend.js
@@ -24,7 +24,6 @@
  * DictionaryDatabase
  * Environment
  * JapaneseUtil
- * JsonSchemaValidator
  * Mecab
  * MediaUtil
  * ObjectPropertyAccessor
@@ -58,7 +57,6 @@ class Backend {
             clipboardReader: this._clipboardReader
         });
         this._options = null;
-        this._profileConditionsSchemaValidator = new JsonSchemaValidator();
         this._profileConditionsSchemaCache = [];
         this._profileConditionsUtil = new ProfileConditionsUtil();
         this._defaultAnkiFieldTemplates = null;
@@ -1018,7 +1016,7 @@ class Backend {
                 this._profileConditionsSchemaCache.push(schema);
             }
 
-            if (conditionGroups.length > 0 && this._profileConditionsSchemaValidator.isValid(optionsContext, schema)) {
+            if (conditionGroups.length > 0 && schema.isValid(optionsContext)) {
                 return profile;
             }
             ++index;
@@ -1029,7 +1027,6 @@ class Backend {
 
     _clearProfileConditionsSchemaCache() {
         this._profileConditionsSchemaCache = [];
-        this._profileConditionsSchemaValidator.clearCache();
     }
 
     _checkLastError() {
diff --git a/ext/js/background/profile-conditions-util.js b/ext/js/background/profile-conditions-util.js
index dcd60796..2de25420 100644
--- a/ext/js/background/profile-conditions-util.js
+++ b/ext/js/background/profile-conditions-util.js
@@ -15,6 +15,10 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+/* global
+ * JsonSchema
+ */
+
 /**
  * Utility class to help processing profile conditions.
  */
@@ -109,11 +113,13 @@ class ProfileConditionsUtil {
                 default: anyOf.push({allOf}); break;
             }
         }
+        let schema;
         switch (anyOf.length) {
-            case 0: return {};
-            case 1: return anyOf[0];
-            default: return {anyOf};
+            case 0: schema = {}; break;
+            case 1: schema = anyOf[0]; break;
+            default: schema = {anyOf}; break;
         }
+        return new JsonSchema(schema);
     }
 
     /**