fix #29753, use ES5 constructors for ddc

pkg/dev_compiler/test/codegen_expected/closure.js

 export const closure = Object.create(null);
 import { core, js, dart, dartx } from 'dart_sdk';
 let dynamic__Toint = () => (dynamic__Toint = dart.constFn(dart.fnTypeFuzzy(core.int, [dart.dynamic], [dart.dynamic])))();
 let dynamic__Todynamic = () => (dynamic__Todynamic = dart.constFn(dart.fnTypeFuzzy(dart.dynamic, [dart.dynamic], {y: core.String, z: dart.dynamic})))();
 let StringToList = () => (StringToList = dart.constFn(dart.fnTypeFuzzy(core.List, [core.String])))();
 let ListOfint = () => (ListOfint = dart.constFn(core.List$(core.int)))();
 let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.fnTypeFuzzy(dart.dynamic, [dart.dynamic])))();
 let FnToListOfint = () => (FnToListOfint = dart.constFn(dart.fnTypeFuzzy(ListOfint(), [dynamicTodynamic()])))();
 let MapOfMap$Map = () => (MapOfMap$Map = dart.constFn(core.Map$(core.Map, core.Map)))();
 let Foo = () => (Foo = dart.constFn(closure.Foo$()))();
@@ skipping 35 matching lines @@
     }
     set s(value) {
       this[s] = value;
     }
     get v() {
       return this[v$];
     }
     set v(value) {
       this[v$] = value;
     }
-    new(i: number, v: T) {
-      this[i$] = i;
-      this[v$] = v;
-      this[b] = null;
-      this[s] = null;
-    }
     static build() {
-      return new (FooOfT())(1, null);
+      return new (FooOfT()).new(1, null);
     }
     untyped_method(a, b) {}
     pass(t: T) {
       T._check(t);
       return t;
     }
     typed_method(foo: closure.Foo<any>, list: core.List<any>, i: number, n: number, d: number, b: boolean, s: string, a: any[], o: Object, f: Function) {
       return '';
     }
     optional_params(a, b = null, c: number = null) {}
     static named_params(a, {b = null, c = null}: {b?: any, c?: number} = {}) {}
     nullary_method() {}
     function_params(f: (x: any, y?: any) => number, g: (x: any, opts?: {y?: string, z?: any}) => any, cb: closure.Callback) {
       cb({i: this.i});
     }
     run(a: core.List<any>, b: string, c: (d: string) => core.List<any>, e: (f: (g: any) => any) => core.List<number>, {h = null}: {h?: core.Map<core.Map<any, any>, core.Map<any, any>>} = {}) {}
     get prop() {
       return null;
     }
     set prop(value: string) {}
     static get staticProp() {
       return null;
     }
     static set staticProp(value: string) {}
   }
+  (Foo.new = function(i: number, v: T) {
+    this[i$] = i;
+    this[v$] = v;
+    this[b] = null;
+    this[s] = null;
+  }).prototype = Foo.prototype;
   dart.addTypeTests(Foo);
   const i$ = Symbol("Foo.i");
   const b = Symbol("Foo.b");
   const s = Symbol("Foo.s");
   const v$ = Symbol("Foo.v");
   dart.setSignature(Foo, {
     fields: () => ({
       i: dart.finalFieldType(core.int),
       b: dart.fieldType(core.bool),
       s: dart.fieldType(core.String),
@@ skipping 22 matching lines @@
   },
   get some_static_final() {
     return "abc";
   },
   get some_static_var() {
     return "abc";
   },
   set some_static_var(_) {}
 });
 closure.Bar = class Bar extends core.Object {};
-closure.Baz = class Baz extends dart.mixin(closure.Foo$(core.int), closure.Bar) {
-  new(i: number) {
-    super.new(i, 123);
-  }
-};
+(closure.Bar.new = function() {
+}).prototype = closure.Bar.prototype;
+closure.Baz = class Baz extends dart.mixin(closure.Foo$(core.int), closure.Bar) {};
+(closure.Baz.new = function(i: number) {
+  closure.Baz.__proto__.new.call(this, i, 123);
+}).prototype = closure.Baz.prototype;
 dart.addSimpleTypeTests(closure.Baz);
 closure.main = function(args): void {
 };
 dart.fn(closure.main, dynamicTovoid());
 dart.defineLazy(closure, {
   get closure() {
     return dart.fn((): core.Null => {
       return;
     }, VoidToNull());
   },
   set closure(_) {},
   get some_top_level_constant() {
     return "abc";
   },
   get some_top_level_final() {
     return "abc";
   },
   get some_top_level_var() {
     return "abc";
   },
   set some_top_level_var(_) {}
 });
 dart.trackLibraries("closure", {
   "closure.dart": closure
 }, null);