Add LayoutTests for URL list of Response

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/response.js

 if (self.importScripts) {
   importScripts('../resources/fetch-test-helpers.js');
   importScripts('/streams/resources/rs-utils.js');
 }
 
 function decode(chunks) {
   var decoder = new TextDecoder();
   var result = '';
   for (var chunk of chunks) {
     result += decoder.decode(chunk, {stream: true});
   }
   result += decoder.decode(new Uint8Array(0));
   return result;
 }
 
 test(function() {
     var response = new Response();
     assert_equals(response.type, 'default',
                   'Default Response.type should be \'default\'');
     assert_equals(response.url, '', 'Response.url should be the empty string');
     assert_equals(response.status, 200,
                   'Default Response.status should be 200');
     assert_true(response.ok, 'Default Response.ok must be true');
     assert_equals(response.statusText, 'OK',
                   'Default Response.statusText should be \'OK\'');
     assert_equals(size(response.headers), 0,
                   'Default Response should not have any header.');
+    if (self.internals) {
+      var urlList = self.internals.getInternalResponseURLList(response);
+      assert_equals(size(urlList), 0,

[falken, 2016/12/09 01:54:15]

I think size() is defined in fetch-test-helpers.js and only meant for headers.
Can this just be urlList.length?

[horo, 2016/12/09 05:04:11]

Done.

+                    'The URL list of Default Response should not be empty.');

[falken, 2016/12/09 01:54:15]

The description seems to contradict the assertion.

[horo, 2016/12/09 05:04:11]

Done.

+    }
 
     response.status = 394;
     response.statusText = 'Sesame Street';
     assert_equals(response.status, 200, 'Response.status should be readonly');
     assert_true(response.ok, 'Response.ok must remain unchanged ' +
                              'when Response.status is attempted ' +
                              'unsuccessfully to change');
     assert_equals(response.statusText, 'OK',
                   'Response.statusText should be readonly');
     response.ok = false;
@@ skipping 53 matching lines @@
                       'X-Fetch-Test of Response.headers should match');
       });
   }, 'Response constructor test');
 
 test(function() {
     var response = new Response(new Blob(['dummy'], {type: 'audio/wav'}));
     assert_equals(size(response.headers), 1,
                   'Response.headers should have Content-Type');
     assert_equals(response.headers.get('Content-Type'), 'audio/wav',
                   'Content-Type of Response.headers should be set');
+    if (self.internals) {
+      var urlList = self.internals.getInternalResponseURLList(response);
+      assert_equals(size(urlList), 0,
+                    'The URL list of generated Response should not be empty.');

[falken, 2016/12/09 01:54:15]

ditto with above

[horo, 2016/12/09 05:04:11]

Done.

+    }
 
     response = new Response(new Blob(['dummy'], {type: 'audio/wav'}),
                             {
                               headers: {
                                 'Content-Type': 'text/html; charset=UTF-8'
                               }
                             });
     assert_equals(size(response.headers), 1,
                   'Response.headers should have Content-Type');
     assert_equals(response.headers.get('Content-Type'),
@@ skipping 338 matching lines @@
 test(function() {
     ['http://ex\x0aample.com',
      'http://ex\x0dample.com'].forEach(function(url) {
         assert_equals(Response.redirect(url).headers.get('Location'),
                       'http://example.com/',
                       'Location header value must not contain CR or LF');
       });
   }, 'Response.redirect() with URLs with CR or LF');
 
 done();