Streams Implementation Update: Reader name and Stream methods

LayoutTests/http/tests/fetch/script-tests/stream-reader.js

 if (self.importScripts) {
   importScripts('/fetch/resources/fetch-test-helpers.js');
 }
 
 function read_until_end(reader) {
   var chunks = [];
   function rec(resolve, reject) {
     while (reader.state === 'readable') {
       chunks.push(reader.read());
     }
@@ skipping 38 matching lines @@
         });
     }
     var stream;
     var reader;
     return fetch('/fetch/resources/doctype.html').then(function(res) {
         stream = res.body;
         reader = stream.getReader();
         return wait_until_readable(reader);
       }).then(function() {
         assert_equals(reader.state, 'readable');
-        assert_equals(stream.state, 'waiting');
         reader.releaseLock();
         assert_equals(reader.state, 'closed');
-        assert_equals(stream.state, 'readable');
         var another = stream.getReader();
         assert_equals(reader.state, 'closed');
-        assert_equals(stream.state, 'waiting');
         assert_equals(another.state, 'readable');
       });
   }, 'ExclusiveStreamReader state masking');
 
 sequential_promise_test(function(t) {
     return fetch('/fetch/resources/doctype.html').then(function(res) {
         var reader = res.body.getReader();
         return read_until_end(reader);
       }).then(function(chunks) {
         var size = 0;
@@ skipping 31 matching lines @@
         res.body;
         assert_false(res.bodyUsed);
         res.text();
         assert_true(res.bodyUsed);
         assert_throws({name: 'TypeError'}, function() { res.body.getReader() });
       });
   }, 'Setting bodyUsed means the body is locked.');
 
 sequential_promise_test_done();
 done();