Prevent test breakage by modifying the extern definiton of Array.prototype.values to be consistent with the canonical externs.
@@ -130,7 +130,7 @@ abstract class IntegrationTestCase extends TestCase {
"/** @type {number} */",
"Array.prototype.length;",
"",
- "/** @return {IteratorIterable<T>} */",
+ "/** @return {!IteratorIterable<T>} */",
"Array.prototype.values;",
"",
"Array.prototype.splice;",
