Add support to dart2js for option --enable-asserts.

tests/language/function_type/function_type60_test.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
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 import 'dart:core';
 import 'dart:core' as core;
 import 'package:expect/expect.dart';
 
 @NoInline()
 @AssumeDynamic()
 confuse(f) => f;
 
-final bool inCheckedMode = (() {
-  bool result = false;
-  assert(result = true);
-  return result;
-})();
-
-typedef F0<T>
-    = Function Function(int x0);
-typedef F1<T>
-    = List<Function> Function(List<T> x0);
-typedef F2<T>
-    = List<T> Function(int y, [core.List<core.int> x]);
-typedef F3<T>
-    = void Function(int x0, [List<Function> x]);
-typedef F4<T>
-    = void Function<A>(List<T> x);
-typedef F5<T>
-    = int Function(int x0, [List<Function> x]) Function();
-typedef F6<T>
-    = int Function([List<T> x1]) Function();
-typedef F7<T>
-    = Function Function(int x, [Function x2]) Function();
-typedef F8<T>
-    = Function Function(int y, {core.List<core.int> x}) Function();
-typedef F9<T>
-    = List<Function> Function([Function x]) Function();
-typedef F10<T>
-    = List<Function> Function(core.List<core.int> x0) Function();
-typedef F11<T>
-    = core.List<core.int> Function(int x1, [int x2]) Function();
-typedef F12<T>
-    = core.List<core.int> Function(int x0, {List<Function> x}) Function();
-typedef F13<T>
-    = List<T> Function(int x) Function();
-typedef F14<T>
-    = List<T> Function(int y, [List<Function> x]) Function();
-typedef F15<T>
-    = List<T> Function(int x1, [List<T> x2]) Function();
-typedef F16<T>
-    = Function({Function x}) Function();
-typedef F17<T>
-    = Function(List<T> x) Function();
-typedef F18<T>
-    = void Function(int x0, [Function x]) Function();
-typedef F19<T>
-    = void Function([core.List<core.int> x1]) Function();
-typedef F20<T>
-    = int Function<A>(List<A> x) Function();
-typedef F21<T>
-    = List<T> Function<A>(int x) Function();
-typedef F22<T>
-    = List<A> Function<A>(Function x) Function();
+typedef F0<T> = Function Function(int x0);
+typedef F1<T> = List<Function> Function(List<T> x0);
+typedef F2<T> = List<T> Function(int y, [core.List<core.int> x]);
+typedef F3<T> = void Function(int x0, [List<Function> x]);
+typedef F4<T> = void Function<A>(List<T> x);
+typedef F5<T> = int Function(int x0, [List<Function> x]) Function();
+typedef F6<T> = int Function([List<T> x1]) Function();
+typedef F7<T> = Function Function(int x, [Function x2]) Function();
+typedef F8<T> = Function Function(int y, {core.List<core.int> x}) Function();
+typedef F9<T> = List<Function> Function([Function x]) Function();
+typedef F10<T> = List<Function> Function(core.List<core.int> x0) Function();
+typedef F11<T> = core.List<core.int> Function(int x1, [int x2]) Function();
+typedef F12<T> = core.List<core.int> Function(int x0, {List<Function> x})
+    Function();
+typedef F13<T> = List<T> Function(int x) Function();
+typedef F14<T> = List<T> Function(int y, [List<Function> x]) Function();
+typedef F15<T> = List<T> Function(int x1, [List<T> x2]) Function();
+typedef F16<T> = Function({Function x}) Function();
+typedef F17<T> = Function(List<T> x) Function();
+typedef F18<T> = void Function(int x0, [Function x]) Function();
+typedef F19<T> = void Function([core.List<core.int> x1]) Function();
+typedef F20<T> = int Function<A>(List<A> x) Function();
+typedef F21<T> = List<T> Function<A>(int x) Function();
+typedef F22<T> = List<A> Function<A>(Function x) Function();
 
 Function f0(int x0) => null;
 List<Function> f1(List<int> x0) => null;
 List<int> f2(int y, [core.List<core.int> x]) => null;
 void f3(int x0, [List<Function> x]) => null;
 void f4<A>(List<int> x) => null;
 int Function(int x0, [List<Function> x]) f5() => null;
 int Function([List<int> x0]) f6() => null;
 Function Function(int x, [Function x0]) f7() => null;
 Function Function(int y, {core.List<core.int> x}) f8() => null;
@@ skipping 141 matching lines @@
     x1 = confuse(m1);
     l1 = confuse(m1);
     if (!tIsBool) {
       Expect.isTrue(f1 is F1<int>);
       Expect.isFalse(f1 is F1<bool>);
       Expect.isTrue(confuse(f1) is F1<int>);
       Expect.isFalse(confuse(f1) is F1<bool>);
       Expect.equals(tIsDynamic, m1 is F1<bool>);
       Expect.equals(tIsDynamic, confuse(m1) is F1<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x1 = (f1 as dynamic);
         });
         Expect.throws(() {
           x1 = confuse(f1);
         });
         List<Function> Function(List<T> x0) l1;
         Expect.throws(() {
           l1 = (f1 as dynamic);
         });
@@ skipping 31 matching lines @@
     x2 = confuse(m2);
     l2 = confuse(m2);
     if (!tIsBool) {
       Expect.isTrue(f2 is F2<int>);
       Expect.isFalse(f2 is F2<bool>);
       Expect.isTrue(confuse(f2) is F2<int>);
       Expect.isFalse(confuse(f2) is F2<bool>);
       Expect.equals(tIsDynamic, m2 is F2<bool>);
       Expect.equals(tIsDynamic, confuse(m2) is F2<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x2 = (f2 as dynamic);
         });
         Expect.throws(() {
           x2 = confuse(f2);
         });
         List<T> Function(int y, [core.List<core.int> x]) l2;
         Expect.throws(() {
           l2 = (f2 as dynamic);
         });
@@ skipping 55 matching lines @@
     x4 = confuse(m4);
     l4 = confuse(m4);
     if (!tIsBool) {
       Expect.isTrue(f4 is F4<int>);
       Expect.isFalse(f4 is F4<bool>);
       Expect.isTrue(confuse(f4) is F4<int>);
       Expect.isFalse(confuse(f4) is F4<bool>);
       Expect.equals(tIsDynamic, m4 is F4<bool>);
       Expect.equals(tIsDynamic, confuse(m4) is F4<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x4 = (f4 as dynamic);
         });
         Expect.throws(() {
           x4 = confuse(f4);
         });
         void Function<A>(List<T> x) l4;
         Expect.throws(() {
           l4 = (f4 as dynamic);
         });
@@ skipping 55 matching lines @@
     x6 = confuse(m6);
     l6 = confuse(m6);
     if (!tIsBool) {
       Expect.isTrue(f6 is F6<int>);
       Expect.isFalse(f6 is F6<bool>);
       Expect.isTrue(confuse(f6) is F6<int>);
       Expect.isFalse(confuse(f6) is F6<bool>);
       Expect.equals(tIsDynamic, m6 is F6<bool>);
       Expect.equals(tIsDynamic, confuse(m6) is F6<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x6 = (f6 as dynamic);
         });
         Expect.throws(() {
           x6 = confuse(f6);
         });
         int Function([List<T> x1]) Function() l6;
         Expect.throws(() {
           l6 = (f6 as dynamic);
         });
@@ skipping 139 matching lines @@
     core.List<core.int> Function(int x0, {List<Function> x}) Function() l12;
     // The static function f12 sets `T` to `int`.
     if (!tIsBool) {
       x12 = f12 as dynamic;
       l12 = f12 as dynamic;
       x12 = confuse(f12);
       l12 = confuse(f12);
     }
 
     Expect.isTrue(m12 is F12);
-    Expect.isTrue(m12 is core.List<core.int> Function(int x0,
-        {List<Function> x}) Function());
+    Expect.isTrue(m12
+        is core.List<core.int> Function(int x0, {List<Function> x}) Function());
     Expect.isTrue(confuse(m12) is F12);
     // In checked mode, verifies the type.
     x12 = m12;
     l12 = m12;
     x12 = confuse(m12);
     l12 = confuse(m12);
   }
 
   /// List<T> Function(int x) Function()
   void testF13() {
@@ skipping 18 matching lines @@
     x13 = confuse(m13);
     l13 = confuse(m13);
     if (!tIsBool) {
       Expect.isTrue(f13 is F13<int>);
       Expect.isFalse(f13 is F13<bool>);
       Expect.isTrue(confuse(f13) is F13<int>);
       Expect.isFalse(confuse(f13) is F13<bool>);
       Expect.equals(tIsDynamic, m13 is F13<bool>);
       Expect.equals(tIsDynamic, confuse(m13) is F13<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x13 = (f13 as dynamic);
         });
         Expect.throws(() {
           x13 = confuse(f13);
         });
         List<T> Function(int x) Function() l13;
         Expect.throws(() {
           l13 = (f13 as dynamic);
         });
@@ skipping 32 matching lines @@
     x14 = confuse(m14);
     l14 = confuse(m14);
     if (!tIsBool) {
       Expect.isTrue(f14 is F14<int>);
       Expect.isFalse(f14 is F14<bool>);
       Expect.isTrue(confuse(f14) is F14<int>);
       Expect.isFalse(confuse(f14) is F14<bool>);
       Expect.equals(tIsDynamic, m14 is F14<bool>);
       Expect.equals(tIsDynamic, confuse(m14) is F14<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x14 = (f14 as dynamic);
         });
         Expect.throws(() {
           x14 = confuse(f14);
         });
         List<T> Function(int y, [List<Function> x]) Function() l14;
         Expect.throws(() {
           l14 = (f14 as dynamic);
         });
@@ skipping 31 matching lines @@
     x15 = confuse(m15);
     l15 = confuse(m15);
     if (!tIsBool) {
       Expect.isTrue(f15 is F15<int>);
       Expect.isFalse(f15 is F15<bool>);
       Expect.isTrue(confuse(f15) is F15<int>);
       Expect.isFalse(confuse(f15) is F15<bool>);
       Expect.equals(tIsDynamic, m15 is F15<bool>);
       Expect.equals(tIsDynamic, confuse(m15) is F15<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x15 = (f15 as dynamic);
         });
         Expect.throws(() {
           x15 = confuse(f15);
         });
         List<T> Function(int x1, [List<T> x2]) Function() l15;
         Expect.throws(() {
           l15 = (f15 as dynamic);
         });
@@ skipping 55 matching lines @@
     x17 = confuse(m17);
     l17 = confuse(m17);
     if (!tIsBool) {
       Expect.isTrue(f17 is F17<int>);
       Expect.isFalse(f17 is F17<bool>);
       Expect.isTrue(confuse(f17) is F17<int>);
       Expect.isFalse(confuse(f17) is F17<bool>);
       Expect.equals(tIsDynamic, m17 is F17<bool>);
       Expect.equals(tIsDynamic, confuse(m17) is F17<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x17 = (f17 as dynamic);
         });
         Expect.throws(() {
           x17 = confuse(f17);
         });
         Function(List<T> x) Function() l17;
         Expect.throws(() {
           l17 = (f17 as dynamic);
         });
@@ skipping 103 matching lines @@
     x21 = confuse(m21);
     l21 = confuse(m21);
     if (!tIsBool) {
       Expect.isTrue(f21 is F21<int>);
       Expect.isFalse(f21 is F21<bool>);
       Expect.isTrue(confuse(f21) is F21<int>);
       Expect.isFalse(confuse(f21) is F21<bool>);
       Expect.equals(tIsDynamic, m21 is F21<bool>);
       Expect.equals(tIsDynamic, confuse(m21) is F21<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x21 = (f21 as dynamic);
         });
         Expect.throws(() {
           x21 = confuse(f21);
         });
         List<T> Function<A>(int x) Function() l21;
         Expect.throws(() {
           l21 = (f21 as dynamic);
         });
@@ skipping 31 matching lines @@
     x22 = confuse(m22);
     l22 = confuse(m22);
   }
 }
 
 void main() {
   new U60().runTests();
   new U60<int>(tIsInt: true).runTests();
   new U60<bool>(tIsBool: true).runTests();
 }