Test whether DDC sdk is up-to-date

pkg/dev_compiler/lib/js/common/dart_sdk.js

Index: pkg/dev_compiler/lib/js/common/dart_sdk.js
diff --git a/pkg/dev_compiler/lib/js/common/dart_sdk.js b/pkg/dev_compiler/lib/js/common/dart_sdk.js
index 9f46eba8dd0b4b61051c5a3ff6f6e71cd8be2e22..a8cd1838472c1efb35eb820a3ff1c361d4a90cf2 100644
--- a/pkg/dev_compiler/lib/js/common/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/common/dart_sdk.js
@@ -116483,22 +116483,6 @@ dart.setSignature(web_sql.SqlTransaction, {
   methods: () => ({[$executeSql]: dart.fnType(dart.void, [core.String], [core.List, web_sql.SqlStatementCallback, web_sql.SqlStatementErrorCallback])})
 });
 dart.registerExtension("SQLTransaction", web_sql.SqlTransaction);
-nativewrappers.NativeFieldWrapperClass1 = class NativeFieldWrapperClass1 extends core.Object {};
-(nativewrappers.NativeFieldWrapperClass1.new = function() {
-}).prototype = nativewrappers.NativeFieldWrapperClass1.prototype;
-dart.addTypeTests(nativewrappers.NativeFieldWrapperClass1);
-nativewrappers.NativeFieldWrapperClass2 = class NativeFieldWrapperClass2 extends core.Object {};
-(nativewrappers.NativeFieldWrapperClass2.new = function() {
-}).prototype = nativewrappers.NativeFieldWrapperClass2.prototype;
-dart.addTypeTests(nativewrappers.NativeFieldWrapperClass2);
-nativewrappers.NativeFieldWrapperClass3 = class NativeFieldWrapperClass3 extends core.Object {};
-(nativewrappers.NativeFieldWrapperClass3.new = function() {
-}).prototype = nativewrappers.NativeFieldWrapperClass3.prototype;
-dart.addTypeTests(nativewrappers.NativeFieldWrapperClass3);
-nativewrappers.NativeFieldWrapperClass4 = class NativeFieldWrapperClass4 extends core.Object {};
-(nativewrappers.NativeFieldWrapperClass4.new = function() {
-}).prototype = nativewrappers.NativeFieldWrapperClass4.prototype;
-dart.addTypeTests(nativewrappers.NativeFieldWrapperClass4);
 dart.trackLibraries("dart_sdk", {
   "dart:_runtime": dart,
   "dart:_debugger": _debugger,