Apply Referrer-Policy header when following redirects

ios/web/public/referrer_util_unittest.cc

Index: ios/web/public/referrer_util_unittest.cc
diff --git a/ios/web/public/referrer_util_unittest.cc b/ios/web/public/referrer_util_unittest.cc
index 0f5f75f8747c0e951ff282539ae07fe81f28ed6f..0d4cb23c3bf1a1fe3d47025e7184e8a8acbf076d 100644
--- a/ios/web/public/referrer_util_unittest.cc
+++ b/ios/web/public/referrer_util_unittest.cc
@@ -164,6 +164,15 @@ TEST(ReferrerUtilTest, PolicyForNavigation) {
         EXPECT_TRUE(policy == ReferrerPolicyDefault ||
                     policy == ReferrerPolicyNoReferrerWhenDowngrade);
         break;
+      case net::URLRequest::ORIGIN:
+        EXPECT_TRUE(policy == ReferrerPolicyOrigin);
+        break;
+      case net::URLRequest::NO_REFERRER:
+        EXPECT_TRUE(policy == ReferrerPolicyNever);
+        break;
+      case net::URLRequest::MAX_REFERRER_POLICY:
+        FAIL();
+        break;
     }
   }
 }