Cache Storage API tests: Fix WPT test bugs, remove redundant local copies

third_party/WebKit/LayoutTests/external/wpt/service-workers/cache-storage/script-tests/cache-add.js

 if (self.importScripts) {
     importScripts('/resources/testharness.js');
     importScripts('../resources/test-helpers.js');
 }
 
 cache_test(function(cache, test) {
     return promise_rejects(
       test,
       new TypeError(),
       cache.add(),
@@ skipping 66 matching lines @@
     return request.text()
       .then(function() {
           assert_false(request.bodyUsed);
         })
       .then(function() {
           return cache.add(request);
         });
   }, 'Cache.add with request with null body (not consumed)');
 
 cache_test(function(cache, test) {
-    return assert_promise_rejects(
+    return promise_rejects(
       test,
       new TypeError(),
       cache.add('../resources/fetch-status.py?status=206'),
       'Cache.add should reject on partial response');
   }, 'Cache.add with 206 response');
 
 cache_test(function(cache, test) {
     var urls = ['../resources/fetch-status.py?status=206',
                 '../resources/fetch-status.py?status=200'];
     var requests = urls.map(function(url) {
         return new Request(url);
       });
     return promise_rejects(
+      test,
       new TypeError(),
       cache.addAll(requests),
       'Cache.addAll should reject with TypeError if any request fails');
   }, 'Cache.addAll with 206 response');
 
 cache_test(function(cache, test) {
     return promise_rejects(
       test,
       new TypeError(),
       cache.add('this-does-not-exist-please-dont-create-it'),
       'Cache.add should reject if response is !ok');
   }, 'Cache.add with request that results in a status of 404');
 
 
 cache_test(function(cache, test) {
     return promise_rejects(
       test,
       new TypeError(),
-      cache.add('../resources/fetch-status.php?status=500'),
+      cache.add('../resources/fetch-status.py?status=500'),
       'Cache.add should reject if response is !ok');
   }, 'Cache.add with request that results in a status of 500');
 
 cache_test(function(cache, test) {
     return promise_rejects(
       test,
       new TypeError(),
       cache.addAll(),
       'Cache.addAll with no arguments should throw TypeError.');
   }, 'Cache.addAll with no arguments');
@@ skipping 130 matching lines @@
     var request = new Request('../resources/simple.txt');
     return promise_rejects(
       test,
       'InvalidStateError',
       cache.addAll([request, request]),
       'Cache.addAll should throw InvalidStateError if the same request is added ' +
       'twice.');
   }, 'Cache.addAll called with the same Request object specified twice');
 
 done();