Bug 1263469 P4 Update test_eventsource_intercept.html to validate FetchEvent.request.cache. r=ehsan

dom/workers/test/serviceworkers/eventsource/eventsource_cors_response_intercept_worker.js

@@ -12,6 +12,7 @@ self.addEventListener('fetch', function (event) {
   }
 
   ok(request.mode === 'cors', 'EventSource should make a CORS request');
+  ok(request.cache === 'no-store', 'EventSource should make a no-store request');
   var fetchRequest = new Request(prefix + 'eventsource.resource', { mode: 'cors'});
   event.respondWith(fetch(fetchRequest).then((fetchResponse) => {
     return fetchResponse;

dom/workers/test/serviceworkers/eventsource/eventsource_mixed_content_cors_response_intercept_worker.js

@@ -11,6 +11,7 @@ self.addEventListener('fetch', function (event) {
   }
 
   ok(request.mode === 'cors', 'EventSource should make a CORS request');
+  ok(request.cache === 'no-store', 'EventSource should make a no-store request');
   var fetchRequest = new Request(prefix + 'eventsource.resource', { mode: 'cors'});
   event.respondWith(fetch(fetchRequest).then((fetchResponse) => {
     return fetchResponse;

dom/workers/test/serviceworkers/eventsource/eventsource_opaque_response_intercept_worker.js

@@ -12,6 +12,7 @@ self.addEventListener('fetch', function (event) {
   }
 
   ok(request.mode === 'cors', 'EventSource should make a CORS request');
+  ok(request.cache === 'no-store', 'EventSource should make a no-store request');
   var fetchRequest = new Request(prefix + 'eventsource.resource', { mode: 'no-cors'});
   event.respondWith(fetch(fetchRequest).then((fetchResponse) => {
     return fetchResponse;