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

tests/language/function_type/function_type5_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.
 
 // GENERATED - DON'T EDIT.
 // GENERATED - DON'T EDIT.
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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>
-    = int Function([int x1]);
-typedef F1<T>
-    = Function Function([List<T> x1]);
-typedef F2<T>
-    = core.List<core.int> Function(core.List<core.int> x0);
-typedef F3<T>
-    = Function(int y, [List<Function> x]);
-typedef F4<T>
-    = Function Function<A>();
-typedef F5<T>
-    = int Function(int y, {int x}) Function(int x);
-typedef F6<T>
-    = int Function(int x1, [core.List<core.int> x]) Function(int x);
-typedef F7<T>
-    = Function Function(int x1) Function(int x);
-typedef F8<T>
-    = Function Function(int x, [List<Function> x1]) Function(int x);
-typedef F9<T>
-    = Function Function(int y, {List<T> x}) Function(int x);
-typedef F10<T>
-    = List<Function> Function([List<Function> x]) Function(int x);
-typedef F11<T>
-    = List<Function> Function(List<T> x1) Function(int x);
-typedef F12<T>
-    = core.List<core.int> Function(int x2, [Function x3]) Function(int x);
-typedef F13<T>
-    = core.List<core.int> Function(int x1, {core.List<core.int> x}) Function(
-        int x);
-typedef F14<T>
-    = List<T> Function(Function x) Function(int x);
-typedef F15<T>
-    = List<T> Function(int y, [core.List<core.int> x]) Function(int x);
-typedef F16<T>
-    = Function([int x1]) Function(int x);
-typedef F17<T>
-    = Function({List<Function> x}) Function(int x);
-typedef F18<T>
-    = Function() Function(int x);
-typedef F19<T>
-    = void Function(int x1, [List<Function> x]) Function(int x);
-typedef F20<T>
-    = void Function([List<T> x1]) Function(int x);
-typedef F21<T>
-    = List<Function> Function<A>(List<Function> x) Function(int x);
-typedef F22<T>
-    = Function<A>(core.List<core.int> x) Function(int x);
-typedef F23<T>
-    = void Function<A>(List<T> x) Function(int x);
+typedef F0<T> = int Function([int x1]);
+typedef F1<T> = Function Function([List<T> x1]);
+typedef F2<T> = core.List<core.int> Function(core.List<core.int> x0);
+typedef F3<T> = Function(int y, [List<Function> x]);
+typedef F4<T> = Function Function<A>();
+typedef F5<T> = int Function(int y, {int x}) Function(int x);
+typedef F6<T> = int Function(int x1, [core.List<core.int> x]) Function(int x);
+typedef F7<T> = Function Function(int x1) Function(int x);
+typedef F8<T> = Function Function(int x, [List<Function> x1]) Function(int x);
+typedef F9<T> = Function Function(int y, {List<T> x}) Function(int x);
+typedef F10<T> = List<Function> Function([List<Function> x]) Function(int x);
+typedef F11<T> = List<Function> Function(List<T> x1) Function(int x);
+typedef F12<T> = core.List<core.int> Function(int x2, [Function x3]) Function(
+    int x);
+typedef F13<T> = core.List<core.int> Function(int x1, {core.List<core.int> x})
+    Function(int x);
+typedef F14<T> = List<T> Function(Function x) Function(int x);
+typedef F15<T> = List<T> Function(int y, [core.List<core.int> x]) Function(
+    int x);
+typedef F16<T> = Function([int x1]) Function(int x);
+typedef F17<T> = Function({List<Function> x}) Function(int x);
+typedef F18<T> = Function() Function(int x);
+typedef F19<T> = void Function(int x1, [List<Function> x]) Function(int x);
+typedef F20<T> = void Function([List<T> x1]) Function(int x);
+typedef F21<T> = List<Function> Function<A>(List<Function> x) Function(int x);
+typedef F22<T> = Function<A>(core.List<core.int> x) Function(int x);
+typedef F23<T> = void Function<A>(List<T> x) Function(int x);
 
 int f0([int x0]) => null;
 Function f1([List<int> x0]) => null;
 core.List<core.int> f2(core.List<core.int> x0) => null;
 f3(int y, [List<Function> x]) => null;
 Function f4<A>() => null;
 int Function(int y, {int x}) f5(int x) => null;
 int Function(int x0, [core.List<core.int> x]) f6(int x) => null;
 Function Function(int x0) f7(int x) => null;
 Function Function(int x, [List<Function> x0]) f8(int x) => null;
@@ skipping 148 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);
         });
         Function Function([List<T> x1]) l1;
         Expect.throws(() {
           l1 = (f1 as dynamic);
         });
@@ skipping 201 matching lines @@
     x9 = confuse(m9);
     l9 = confuse(m9);
     if (!tIsBool) {
       Expect.isTrue(f9 is F9<int>);
       Expect.isFalse(f9 is F9<bool>);
       Expect.isTrue(confuse(f9) is F9<int>);
       Expect.isFalse(confuse(f9) is F9<bool>);
       Expect.equals(tIsDynamic, m9 is F9<bool>);
       Expect.equals(tIsDynamic, confuse(m9) is F9<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x9 = (f9 as dynamic);
         });
         Expect.throws(() {
           x9 = confuse(f9);
         });
         Function Function(int y, {List<T> x}) Function(int x) l9;
         Expect.throws(() {
           l9 = (f9 as dynamic);
         });
@@ skipping 56 matching lines @@
     x11 = confuse(m11);
     l11 = confuse(m11);
     if (!tIsBool) {
       Expect.isTrue(f11 is F11<int>);
       Expect.isFalse(f11 is F11<bool>);
       Expect.isTrue(confuse(f11) is F11<int>);
       Expect.isFalse(confuse(f11) is F11<bool>);
       Expect.equals(tIsDynamic, m11 is F11<bool>);
       Expect.equals(tIsDynamic, confuse(m11) is F11<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x11 = (f11 as dynamic);
         });
         Expect.throws(() {
           x11 = confuse(f11);
         });
         List<Function> Function(List<T> x1) Function(int x) l11;
         Expect.throws(() {
           l11 = (f11 as dynamic);
         });
@@ skipping 16 matching lines @@
     core.List<core.int> Function(int x2, [Function x3]) Function(int x) 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 x2,
-        [Function x3]) Function(int x));
+    Expect.isTrue(m12 is core.List<core.int> Function(int x2, [Function x3])
+        Function(int x));
     Expect.isTrue(confuse(m12) is F12);
     // In checked mode, verifies the type.
     x12 = m12;
     l12 = m12;
     x12 = confuse(m12);
     l12 = confuse(m12);
   }
 
   /// core.List<core.int> Function(int x1, {core.List<core.int> x}) Function(int x)
   void testF13() {
     Expect.isTrue(f13 is F13);
     Expect.isTrue(confuse(f13) is F13);
     // In checked mode, verifies the type.
     core.List<core.int> Function(int x1, {core.List<core.int> x}) Function(
         int x) l13;
     // The static function f13 sets `T` to `int`.
     if (!tIsBool) {
       x13 = f13 as dynamic;
       l13 = f13 as dynamic;
       x13 = confuse(f13);
       l13 = confuse(f13);
     }
 
     Expect.isTrue(m13 is F13);
     Expect.isTrue(m13 is core.List<core.int> Function(int x1,
-        {core.List<core.int> x}) Function(int x));
+            {core.List<core.int> x})
+        Function(int x));
     Expect.isTrue(confuse(m13) is F13);
     // In checked mode, verifies the type.
     x13 = m13;
     l13 = m13;
     x13 = confuse(m13);
     l13 = confuse(m13);
   }
 
   /// List<T> Function(Function x) Function(int x)
   void testF14() {
@@ skipping 18 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(Function x) Function(int x) l14;
         Expect.throws(() {
           l14 = (f14 as dynamic);
         });
@@ skipping 16 matching lines @@
     List<T> Function(int y, [core.List<core.int> x]) Function(int x) l15;
     // The static function f15 sets `T` to `int`.
     if (!tIsBool) {
       x15 = f15 as dynamic;
       l15 = f15 as dynamic;
       x15 = confuse(f15);
       l15 = confuse(f15);
     }
 
     Expect.isTrue(m15 is F15);
-    Expect.isTrue(m15 is List<T> Function(int y,
-        [core.List<core.int> x]) Function(int x));
+    Expect.isTrue(m15 is List<T> Function(int y, [core.List<core.int> x])
+        Function(int x));
     Expect.isTrue(confuse(m15) is F15);
     // In checked mode, verifies the type.
     x15 = m15;
     l15 = m15;
     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 y, [core.List<core.int> x]) Function(int x) l15;
         Expect.throws(() {
           l15 = (f15 as dynamic);
         });
@@ skipping 129 matching lines @@
     x20 = confuse(m20);
     l20 = confuse(m20);
     if (!tIsBool) {
       Expect.isTrue(f20 is F20<int>);
       Expect.isFalse(f20 is F20<bool>);
       Expect.isTrue(confuse(f20) is F20<int>);
       Expect.isFalse(confuse(f20) is F20<bool>);
       Expect.equals(tIsDynamic, m20 is F20<bool>);
       Expect.equals(tIsDynamic, confuse(m20) is F20<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x20 = (f20 as dynamic);
         });
         Expect.throws(() {
           x20 = confuse(f20);
         });
         void Function([List<T> x1]) Function(int x) l20;
         Expect.throws(() {
           l20 = (f20 as dynamic);
         });
@@ skipping 80 matching lines @@
     x23 = confuse(m23);
     l23 = confuse(m23);
     if (!tIsBool) {
       Expect.isTrue(f23 is F23<int>);
       Expect.isFalse(f23 is F23<bool>);
       Expect.isTrue(confuse(f23) is F23<int>);
       Expect.isFalse(confuse(f23) is F23<bool>);
       Expect.equals(tIsDynamic, m23 is F23<bool>);
       Expect.equals(tIsDynamic, confuse(m23) is F23<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x23 = (f23 as dynamic);
         });
         Expect.throws(() {
           x23 = confuse(f23);
         });
         void Function<A>(List<T> x) Function(int x) l23;
         Expect.throws(() {
           l23 = (f23 as dynamic);
         });
         Expect.throws(() {
           l23 = confuse(f23);
         });
       }
       void Function<A>(List<T> x) Function(int x) l23 = m23;
       // In checked mode, verifies the type.
       x23 = m23;
       x23 = confuse(m23);
     }
   }
 }
 
 void main() {
   new U5().runTests();
   new U5<int>(tIsInt: true).runTests();
   new U5<bool>(tIsBool: true).runTests();
 }