pkg/dev_compiler/lib/js/legacy/dart_sdk.js

Index: pkg/dev_compiler/lib/js/legacy/dart_sdk.js
diff --git a/pkg/dev_compiler/lib/js/legacy/dart_sdk.js b/pkg/dev_compiler/lib/js/legacy/dart_sdk.js
index 222f6226cca83c0f9b9f53950c6f67bc47bd923c..cf5ca5dd0360f5148c5deb9103e1903cda459444 100644
--- a/pkg/dev_compiler/lib/js/legacy/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/legacy/dart_sdk.js
@@ -25728,13 +25728,13 @@ dart_library.library('dart_sdk', null, /* Imports */[
         this[_modifications$] = modifications;
         this[_cell$] = null;
         this[_current$2] = null;
-        this[_cell$] = collection._LinkedHashSetCell._check(dart.dload(this[_set], _first$));
+        this[_cell$] = this[_set][_first$];
       }
       get current() {
         return this[_current$2];
       }
       moveNext() {
-        if (!dart.equals(this[_modifications$], dart.dload(this[_set], _modifications$))) {
+        if (this[_modifications$] != this[_set][_modifications$]) {
           dart.throw(new core.ConcurrentModificationError(this[_set]));
         } else if (this[_cell$] == null) {
           this[_current$2] = null;
@@ -25749,9 +25749,9 @@ dart_library.library('dart_sdk', null, /* Imports */[
     dart.addTypeTests(_LinkedHashSetIterator);
     _LinkedHashSetIterator[dart.implements] = () => [IteratorOfE()];
     dart.setSignature(_LinkedHashSetIterator, {
-      constructors: () => ({new: dart.definiteFunctionType(collection._LinkedHashSetIterator$(E), [dart.dynamic, core.int])}),
+      constructors: () => ({new: dart.definiteFunctionType(collection._LinkedHashSetIterator$(E), [collection._LinkedHashSet, core.int])}),
       fields: () => ({
-        [_set]: dart.dynamic,
+        [_set]: collection._LinkedHashSet,
         [_modifications$]: core.int,
         [_cell$]: collection._LinkedHashSetCell,
         [_current$2]: E
@@ -99196,7 +99196,7 @@ dart_library.library('dart_sdk', null, /* Imports */[
       let copy = this.newJsList(length);
       this.writeSlot(slot, copy);
       for (; i < dart.notNull(length); i++) {
-        dart.dsetindex(copy, i, this.walk(e[dartx._get](i)));
+        copy[dartx._set](i, this.walk(e[dartx._get](i)));
       }
       return copy;
     }
@@ -99217,7 +99217,7 @@ dart_library.library('dart_sdk', null, /* Imports */[
       writeSlot: dart.definiteFunctionType(dart.dynamic, [core.int, dart.dynamic]),
       cleanupSlots: dart.definiteFunctionType(dart.dynamic, []),
       walk: dart.definiteFunctionType(dart.dynamic, [dart.dynamic]),
-      copyList: dart.definiteFunctionType(dart.dynamic, [core.List, core.int]),
+      copyList: dart.definiteFunctionType(core.List, [core.List, core.int]),
       convertDartToNative_PrepareForStructuredClone: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])
     })
   });
@@ -99266,14 +99266,15 @@ dart_library.library('dart_sdk', null, /* Imports */[
         return copy;
       }
       if (dart.test(html_common.isJavaScriptArray(e))) {
-        let slot = this.findSlot(e);
+        let l = e;
+        let slot = this.findSlot(l);
         let copy = this.readSlot(slot);
         if (copy != null) return copy;
-        let length = core.int._check(dart.dload(e, 'length'));
-        copy = dart.test(this.mustCopy) ? this.newDartList(length) : e;
+        let length = l[dartx.length];
+        copy = dart.test(this.mustCopy) ? this.newDartList(length) : l;
         this.writeSlot(slot, copy);
         for (let i = 0; i < dart.notNull(length); i++) {
-          dart.dsetindex(copy, i, this.walk(dart.dindex(e, i)));
+          copy[dartx._set](i, this.walk(l[dartx._get](i)));
         }
         return copy;
       }
@@ -99434,7 +99435,7 @@ dart_library.library('dart_sdk', null, /* Imports */[
     methods: () => ({
       newJsMap: dart.definiteFunctionType(dart.dynamic, []),
       putIntoMap: dart.definiteFunctionType(dart.void, [dart.dynamic, dart.dynamic, dart.dynamic]),
-      newJsList: dart.definiteFunctionType(dart.dynamic, [dart.dynamic]),
+      newJsList: dart.definiteFunctionType(core.List, [dart.dynamic]),
       cloneNotRequired: dart.definiteFunctionType(core.bool, [dart.dynamic])
     })
   });
@@ -99459,10 +99460,10 @@ dart_library.library('dart_sdk', null, /* Imports */[
   };
   dart.setSignature(html_common._AcceptStructuredCloneDart2Js, {
     methods: () => ({
-      newJsList: dart.definiteFunctionType(dart.dynamic, [dart.dynamic]),
-      newDartList: dart.definiteFunctionType(dart.dynamic, [dart.dynamic]),
+      newJsList: dart.definiteFunctionType(core.List, [dart.dynamic]),
+      newDartList: dart.definiteFunctionType(core.List, [dart.dynamic]),
       identicalInJs: dart.definiteFunctionType(core.bool, [dart.dynamic, dart.dynamic]),
-      forEachJsField: dart.definiteFunctionType(dart.void, [dart.dynamic, dart.dynamic])
+      forEachJsField: dart.definiteFunctionType(dart.void, [dart.dynamic, dynamicAnddynamicTodynamic()])
     })
   });
   html_common.isJavaScriptDate = function(value) {