fixes #27385, implement virtual fields in DDC

pkg/dev_compiler/lib/js/amd/dart_sdk.js

Index: pkg/dev_compiler/lib/js/amd/dart_sdk.js
diff --git a/pkg/dev_compiler/lib/js/amd/dart_sdk.js b/pkg/dev_compiler/lib/js/amd/dart_sdk.js
index 9c3fe22676a212ad6ecacad98c56a223c9153001..c28cb0b345d6628ef06955ee82d7791ac154cf7c 100644
--- a/pkg/dev_compiler/lib/js/amd/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/amd/dart_sdk.js
@@ -521,8 +521,8 @@ define([], function() {
   let CompleterOfString = () => (CompleterOfString = dart.constFn(async.Completer$(core.String)))();
   let CompleterOfMetadata = () => (CompleterOfMetadata = dart.constFn(async.Completer$(html$.Metadata)))();
   let CompleterOfListOfEntry = () => (CompleterOfListOfEntry = dart.constFn(async.Completer$(ListOfEntry())))();
-  let ListOfStyleSheet = () => (ListOfStyleSheet = dart.constFn(core.List$(html$.StyleSheet)))();
   let EventStreamProviderOfSecurityPolicyViolationEvent = () => (EventStreamProviderOfSecurityPolicyViolationEvent = dart.constFn(html$.EventStreamProvider$(html$.SecurityPolicyViolationEvent)))();
+  let ListOfStyleSheet = () => (ListOfStyleSheet = dart.constFn(core.List$(html$.StyleSheet)))();
   let ImmutableListMixin = () => (ImmutableListMixin = dart.constFn(html$.ImmutableListMixin$()))();
   let ElementAndElementToint = () => (ElementAndElementToint = dart.constFn(dart.functionType(core.int, [html$.Element, html$.Element])))();
   let ElementTobool = () => (ElementTobool = dart.constFn(dart.functionType(core.bool, [html$.Element])))();