Service Worker: Correct Web IDL of FetchEvent.respondWith method.

LayoutTests/http/tests/serviceworker/resources/fetch-event-respond-with-argument-iframe.html

Index: LayoutTests/http/tests/serviceworker/resources/fetch-event-respond-with-argument-iframe.html
diff --git a/LayoutTests/http/tests/serviceworker/resources/fetch-event-network-error-controllee-iframe.html b/LayoutTests/http/tests/serviceworker/resources/fetch-event-respond-with-argument-iframe.html
similarity index 78%
copy from LayoutTests/http/tests/serviceworker/resources/fetch-event-network-error-controllee-iframe.html
copy to LayoutTests/http/tests/serviceworker/resources/fetch-event-respond-with-argument-iframe.html
index a4c9307e745e2625b9048ab105ee8855262471ba..33b47e78a349dfda70f9dc9a230a34152305640c 100644
--- a/LayoutTests/http/tests/serviceworker/resources/fetch-event-network-error-controllee-iframe.html
+++ b/LayoutTests/http/tests/serviceworker/resources/fetch-event-respond-with-argument-iframe.html
@@ -34,13 +34,9 @@ function make_test(testcase) {
 
 function run_tests() {
   var tests = [
-    { name: 'prevent-default-and-respond-with', expect_load: true },
-    { name: 'prevent-default', expect_load: false },
-    { name: 'reject', expect_load: false },
-    { name: 'unused-body', expect_load: true },
-    { name: 'used-body', expect_load: false },
-    { name: 'unused-fetched-body', expect_load: true },
-    { name: 'used-fetched-body', expect_load: false }
+    { name: 'response-object', expect_load: true },
+    { name: 'response-promise-object', expect_load: true },
+    { name: 'other-value', expect_load: false },

[falken, 2015/07/27 00:44:41]

'object' or 'object-instance' seems more clear than 'other-value'

Would it make sense to add a test for 'null' just for more completeness?

[jungkees, 2015/07/27 01:21:32]

IMO, any single case which is neither a Response nor a Promise<Response> is
enough here as it merely turns to something like Promise.resolve(value). Then
the promise gets through the existing implementation where other than a valid
Response object will end up with a network error.

   ].map(make_test);
 
   Promise.all(tests)