fixes #27385, implement virtual fields in DDC

pkg/dev_compiler/lib/js/es6/dart_sdk.js

Index: pkg/dev_compiler/lib/js/es6/dart_sdk.js
diff --git a/pkg/dev_compiler/lib/js/es6/dart_sdk.js b/pkg/dev_compiler/lib/js/es6/dart_sdk.js
index 1d72403b7599321ad974be8e47ae2b164e8dcc3c..a575b5100e67a31774284aac182980e95d17e802 100644
--- a/pkg/dev_compiler/lib/js/es6/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/es6/dart_sdk.js
@@ -519,8 +519,8 @@ let ListOfFile = () => (ListOfFile = dart.constFn(core.List$(html.File)))();
 let CompleterOfString = () => (CompleterOfString = dart.constFn(async.Completer$(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])))();