Cleanup references to the old DDC repo

pkg/dev_compiler/test/browser/language_tests.js

Index: pkg/dev_compiler/test/browser/language_tests.js
diff --git a/pkg/dev_compiler/test/browser/language_tests.js b/pkg/dev_compiler/test/browser/language_tests.js
index 4266b3c9bfd2fac226bbd7d03ef12642d163b167..a78d7870d31bb938b8a076748d8a3bb39af28094 100644
--- a/pkg/dev_compiler/test/browser/language_tests.js
+++ b/pkg/dev_compiler/test/browser/language_tests.js
@@ -52,7 +52,7 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'assertion_test': skip_fail,
       'async_await_test_none_multi': 'unittest',
       'async_await_test_02_multi': 'unittest',
-      'async_await_test_03_multi': skip_fail,  // Flaky on travis (#634)
+      'async_await_test_03_multi': skip_fail,  // Flaky on travis (#27224)
       'async_star_await_pauses_test': skip_fail,
 
       // TODO(jmesserly): figure out why this test is hanging.
@@ -61,8 +61,7 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'async_star_cancel_while_paused_test': skip_fail,
       'async_star_regression_fisk_test': skip_fail,
 
-      // TODO(vsm): Re-enable.
-      // See https://github.com/dart-lang/dev_compiler/issues/456
+      // TODO(vsm): Re-enable (#28319)
       'async_star_test_none_multi': ['unittest', 'skip', 'fail'],
       'async_star_test_01_multi': ['unittest', 'skip', 'fail'],
       'async_star_test_02_multi': ['unittest', 'skip', 'fail'],
@@ -95,9 +94,6 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'cha_deopt1_test': skip_fail,
       'cha_deopt2_test': skip_fail,
       'cha_deopt3_test': skip_fail,
-
-      // interpolation does not call Dart's toString:
-      // https://github.com/dart-lang/dev_compiler/issues/470
       'class_syntax2_test': skip_fail,
       'classes_static_method_clash_test': skip_fail,
       'closure_call_wrong_argument_count_negative_test': skip_fail,
@@ -407,10 +403,6 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
     'lib/convert': {
       'encoding_test': skip_timeout,
 
-      // TODO(jmesserly): this is in an inconsistent state between our old and
-      // newer SDKs.
-      'html_escape_test': ['skip'],
-
       'json_utf8_chunk_test': skip_timeout,
       'latin1_test': skip_timeout,