[ServiceWorker] Update formatting for tests.

LayoutTests/http/tests/serviceworker/resources/cache-delete-worker.js

 importScripts('worker-testharness.js');
 importScripts('/resources/testharness-helpers.js');
 
 var test_url = 'https://example.com/foo';
 
 // Construct a generic Request object. The URL is |test_url|. All other fields
 // are defaults.
 function new_test_request() {
   return new Request(test_url);
 }
@@ skipping 109 matching lines @@
 // is to test that CacheQueryOptions, if specified, are used.
 
 prepopulated_cache_test(function(cache) {
     return cache.delete('http://example.com/a', { prefixMatch: true })
       .then(function(result) {
           assert_true(result,
                       'Cache.delete should resolve with "true" if an entry ' +
                       'was successfully deleted.');
         })
       .then(function() {
-          return Promise.all([].concat(
-            // The entries 'a' and 'a_with_query' should have been deleted.
-            ['a', 'a_with_query'].map(function(k) {
-                return assert_promise_rejects(
-                  cache.match(cache_entries[k].request.url),
-                  'NotFoundError',
-                  'Cache.delete should respect "prefixMatch" option.');
-              }),
-            // The entry 'b' should still be in the cache.
-            cache.match(cache_entries.b.request.url)
+          return Promise.all(
+            [].concat(
+              // The entries 'a' and 'a_with_query' should have been deleted.
+              ['a', 'a_with_query'].map(function(k) {
+                  return assert_promise_rejects(
+                    cache.match(cache_entries[k].request.url),
+                    'NotFoundError',
+                    'Cache.delete should respect "prefixMatch" option.');
+                }),
+              // The entry 'b' should still be in the cache.
+              cache.match(cache_entries.b.request.url)
               .catch(function() {
                   assert_unreached('Cache.delete should respect ' +
                                    '"prefixMatch" option.');
                 })
             ));
         });
   }, 'Cache.delete with CacheQueryOptions.*');
 
 prepopulated_cache_test(function(cache) {
     return cache.delete('http://example.com/ac', { prefixMatch: true })
       .then(function(result) {
           assert_false(result,
                        'Cache.delete should resolve with "false" if there ' +
                        'are no matching entries.');
         });
   }, 'Cache.delete with CacheQueryOptions.* that don\'t match');