Tag closures with their types

test/codegen/expect/BenchmarkBase.js

 var BenchmarkBase = dart.defineLibrary(BenchmarkBase, {});
 var core = dart.import(core);
 (function(exports, core) {
   'use strict';
   class Expect extends core.Object {
     static equals(expected, actual) {
       if (!dart.equals(expected, actual)) {
         throw `Values not equal: ${expected} vs ${actual}`;
       }
     }
     static listEquals(expected, actual) {
       if (expected[core.$length] != actual[core.$length]) {
         throw `Lists have different lengths: ${expected[core.$length]} vs ${actual[core.$length]}`;
       }
       for (let i = 0; dart.notNull(i) < dart.notNull(actual[core.$length]); i = dart.notNull(i) + 1) {
         Expect.equals(expected[core.$get](i), actual[core.$get](i));
       }
     }
     fail(message) {
       throw message;
     }
   }
+  dart.setSignature(Expect, {
+    methods: () => ({fail: dart.functionType(dart.dynamic, [dart.dynamic])}),
+    statics: () => ({
+      equals: dart.functionType(dart.void, [dart.dynamic, dart.dynamic]),
+      listEquals: dart.functionType(dart.void, [core.List, core.List])
+    }),
+    names: ['equals', 'listEquals']
+  });
   class BenchmarkBase extends core.Object {
     BenchmarkBase(name) {
       this.name = name;
     }
     run() {}
     warmup() {
       this.run();
     }
     exercise() {
       for (let i = 0; dart.notNull(i) < 10; i = dart.notNull(i) + 1) {
@@ skipping 10 matching lines @@
       let elapsed = 0;
       while (dart.notNull(elapsed) < dart.notNull(timeMinimum)) {
         dart.dcall(f);
         elapsed = watch.elapsedMilliseconds;
         iter = dart.notNull(iter) + 1;
       }
       return 1000.0 * dart.notNull(elapsed) / dart.notNull(iter);
     }
     measure() {
       this.setup();
-      BenchmarkBase.measureFor((() => {
+      BenchmarkBase.measureFor(dart.fn((() => {
         this.warmup();
-      }).bind(this), 100);
-      let result = BenchmarkBase.measureFor((() => {
+      }).bind(this)), 100);
+      let result = BenchmarkBase.measureFor(dart.fn((() => {
         this.exercise();
-      }).bind(this), 2000);
+      }).bind(this)), 2000);
       this.teardown();
       return result;
     }
     report() {
       let score = this.measure();
       core.print(`${this.name}(RunTime): ${score} us.`);
     }
   }
+  dart.setSignature(BenchmarkBase, {
+    methods: () => ({
+      run: dart.functionType(dart.void, []),
+      warmup: dart.functionType(dart.void, []),
+      exercise: dart.functionType(dart.void, []),
+      setup: dart.functionType(dart.void, []),
+      teardown: dart.functionType(dart.void, []),
+      measure: dart.functionType(core.double, []),
+      report: dart.functionType(dart.void, [])
+    }),
+    statics: () => ({measureFor: dart.functionType(core.double, [core.Function, core.int])}),
+    names: ['measureFor']
+  });
   // Exports:
   exports.Expect = Expect;
   exports.BenchmarkBase = BenchmarkBase;
 })(BenchmarkBase, core);