Fix cast

Change-Id: I13cc44847ba23e784c4a14a9de6bc3be083e7b2c
diff --git a/src/main/java/com/android/tools/r8/synthesis/SyntheticItems.java b/src/main/java/com/android/tools/r8/synthesis/SyntheticItems.java
index 77de66a..9b67476 100644
--- a/src/main/java/com/android/tools/r8/synthesis/SyntheticItems.java
+++ b/src/main/java/com/android/tools/r8/synthesis/SyntheticItems.java
@@ -723,7 +723,7 @@
               buildMethodCallback.accept(methodBuilder.disableAndroidApiLevelCheck());
             },
             emptyConsumer());
-    return ClasspathMethod.create(clazz, methodDefinition);
+    return new ClasspathMethod(clazz, methodDefinition);
   }
 
   @SuppressWarnings("unchecked")