Add generic types to Future.forEach in DDC sdk

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 674993a1a37d40b1ccda02700465db71af65d846..e3131b9352e129ff8f473dedc4397a51e2a597b7 100644
--- a/pkg/dev_compiler/lib/js/common/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/common/dart_sdk.js
@@ -19094,12 +19094,14 @@
           return completer.future;
         };
       }
-      static forEach(input, f) {
-        let iterator = input[dartx.iterator];
-        return async.Future.doWhile(dart.fn(() => {
-          if (!dart.test(iterator.moveNext())) return false;
-          return async.Future.sync(dart.fn(() => dart.dcall(f, iterator.current), VoidTodynamic$())).then(core.bool)(dart.fn(_ => true, dynamicTobool$()));
-        }, VoidToObject$()));
+      static forEach(T) {
+        return (input, f) => {
+          let iterator = input[dartx.iterator];
+          return async.Future.doWhile(dart.fn(() => {
+            if (!dart.test(iterator.moveNext())) return false;
+            return async.Future.sync(dart.fn(() => f(iterator.current), VoidTodynamic$())).then(core.bool)(dart.fn(_ => true, dynamicTobool$()));
+          }, VoidToObject$()));
+        };
       }
       static doWhile(f) {
         let doneSignal = new async._Future();
@@ -19129,7 +19131,7 @@
       statics: () => ({
         wait: dart.definiteFunctionType(T => [async.Future$(core.List$(T)), [core.Iterable$(async.Future$(T))], {eagerError: core.bool, cleanUp: dart.functionType(dart.void, [T])}]),
         any: dart.definiteFunctionType(T => [async.Future$(T), [core.Iterable$(async.Future$(T))]]),
-        forEach: dart.definiteFunctionType(async.Future, [core.Iterable, dynamicTodynamic()]),
+        forEach: dart.definiteFunctionType(T => [async.Future, [core.Iterable$(T), dart.functionType(dart.dynamic, [T])]]),
         doWhile: dart.definiteFunctionType(async.Future, [VoidTodynamic()])
       }),
       names: ['wait', 'any', 'forEach', 'doWhile']