[Fetch API] Streaming error should be reported as a TypeError

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/body-mixin.js

Index: third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/body-mixin.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/body-mixin.js b/third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/body-mixin.js
index c391b7930e48992072dad6d4a30f56cd717e5d95..078afab5c8ad91752021a0c62b62a9a71192dfd3 100644
--- a/third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/body-mixin.js
+++ b/third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/body-mixin.js
@@ -295,4 +295,12 @@ promise_test(t => {
       });
   }, 'Locked => text');
 
+promise_test(t => {
+    return fetch('/fetch/resources/slow-failure.cgi').then(response => {
+        return response.text().then(unreached_fulfillment(t), e => {
+            assert_equals(e.name, 'TypeError');
+          });
+      });
+  }, 'streaming error');
+
 done();