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

tests/language/function_type/function_type91_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.
 // GENERATED - DON'T EDIT.
 // 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>
-    = Function Function(int x0, [core.List<core.int> x]);
-typedef F1<T>
-    = core.List<core.int> Function([List<Function> x]);
-typedef F2<T>
-    = Function(Function x);
-typedef F3<T>
-    = void Function();
-typedef F4<T>
-    = int Function(int x2, [int x3]) Function<B extends core.int>(int x);
-typedef F5<T>
-    = int Function(int x1, {List<Function> x}) Function<B extends core.int>(
-        int x);
-typedef F6<T>
-    = Function Function(int x) Function<B extends core.int>(int x);
-typedef F7<T>
-    = Function Function(int y, [List<Function> x]) Function<B extends core.int>(
-        int x);
-typedef F8<T>
-    = Function Function(int x2, [List<T> x3]) Function<B extends core.int>(
-        int x);
-typedef F9<T>
-    = List<Function> Function({Function x}) Function<B extends core.int>(int x);
-typedef F10<T>
-    = List<Function> Function(List<T> x) Function<B extends core.int>(int x);
-typedef F11<T>
-    = core.List<core.int> Function(int x1,
-        [Function x]) Function<B extends core.int>(int x);
-typedef F12<T>
-    = core.List<core.int> Function(
-        [core.List<core.int> x1]) Function<B extends core.int>(int x);
-typedef F13<T>
-    = List<T> Function(int x, [int x1]) Function<B extends core.int>(int x);
-typedef F14<T>
-    = List<T> Function(int y, {List<Function> x}) Function<B extends core.int>(
-        int x);
-typedef F15<T>
-    = Function([int x]) Function<B extends core.int>(int x);
-typedef F16<T>
-    = Function(List<Function> x1) Function<B extends core.int>(int x);
-typedef F17<T>
-    = Function(int x, [List<T> x1]) Function<B extends core.int>(int x);
-typedef F18<T>
-    = void Function(int x1, {Function x}) Function<B extends core.int>(int x);
-typedef F19<T>
-    = void Function([List<T> x]) Function<B extends core.int>(int x);
-typedef F20<T>
-    = Function Function<A>(A x) Function<B extends core.int>(int x);
-typedef F21<T>
-    = List<T> Function<A>(List<A> x) Function<B extends core.int>(int x);
-typedef F22<T>
-    = void Function<A>(int x) Function<B extends core.int>(int x);
+typedef F0<T> = Function Function(int x0, [core.List<core.int> x]);
+typedef F1<T> = core.List<core.int> Function([List<Function> x]);
+typedef F2<T> = Function(Function x);
+typedef F3<T> = void Function();
+typedef F4<T> = int Function(int x2, [int x3]) Function<B extends core.int>(
+    int x);
+typedef F5<T> = int Function(int x1, {List<Function> x})
+    Function<B extends core.int>(int x);
+typedef F6<T> = Function Function(int x) Function<B extends core.int>(int x);
+typedef F7<T> = Function Function(int y, [List<Function> x])
+    Function<B extends core.int>(int x);
+typedef F8<T> = Function Function(int x2, [List<T> x3])
+    Function<B extends core.int>(int x);
+typedef F9<T> = List<Function> Function({Function x})
+    Function<B extends core.int>(int x);
+typedef F10<T> = List<Function> Function(List<T> x)
+    Function<B extends core.int>(int x);
+typedef F11<T> = core.List<core.int> Function(int x1, [Function x])
+    Function<B extends core.int>(int x);
+typedef F12<T> = core.List<core.int> Function([core.List<core.int> x1])
+    Function<B extends core.int>(int x);
+typedef F13<T> = List<T> Function(int x, [int x1]) Function<B extends core.int>(
+    int x);
+typedef F14<T> = List<T> Function(int y, {List<Function> x})
+    Function<B extends core.int>(int x);
+typedef F15<T> = Function([int x]) Function<B extends core.int>(int x);
+typedef F16<T> = Function(List<Function> x1) Function<B extends core.int>(
+    int x);
+typedef F17<T> = Function(int x, [List<T> x1]) Function<B extends core.int>(
+    int x);
+typedef F18<T> = void Function(int x1, {Function x})
+    Function<B extends core.int>(int x);
+typedef F19<T> = void Function([List<T> x]) Function<B extends core.int>(int x);
+typedef F20<T> = Function Function<A>(A x) Function<B extends core.int>(int x);
+typedef F21<T> = List<T> Function<A>(List<A> x) Function<B extends core.int>(
+    int x);
+typedef F22<T> = void Function<A>(int x) Function<B extends core.int>(int x);
 
 Function f0(int x0, [core.List<core.int> x]) => null;
 core.List<core.int> f1([List<Function> x]) => null;
 f2(Function x) => null;
 void f3() => null;
 int Function(int x0, [int x1]) f4<B extends core.int>(int x) => null;
 int Function(int x0, {List<Function> x}) f5<B extends core.int>(int x) => null;
 Function Function(int x) f6<B extends core.int>(int x) => null;
 Function Function(int y, [List<Function> x]) f7<B extends core.int>(int x) =>
     null;
@@ skipping 30 matching lines @@
   int Function(int x2, [int x3]) Function<B extends core.int>(int x) x4;
   int Function(int x1, {List<Function> x}) Function<B extends core.int>(int x)
       x5;
   Function Function(int x) Function<B extends core.int>(int x) x6;
   Function Function(int y, [List<Function> x]) Function<B extends core.int>(
       int x) x7;
   Function Function(int x2, [List<T> x3]) Function<B extends core.int>(int x)
       x8;
   List<Function> Function({Function x}) Function<B extends core.int>(int x) x9;
   List<Function> Function(List<T> x) Function<B extends core.int>(int x) x10;
-  core.List<core.int> Function(int x1,
-      [Function x]) Function<B extends core.int>(int x) x11;
-  core.List<core.int> Function(
-      [core.List<core.int> x1]) Function<B extends core.int>(int x) x12;
+  core.List<core.int> Function(int x1, [Function x])
+      Function<B extends core.int>(int x) x11;
+  core.List<core.int> Function([core.List<core.int> x1])
+      Function<B extends core.int>(int x) x12;
   List<T> Function(int x, [int x1]) Function<B extends core.int>(int x) x13;
   List<T> Function(int y, {List<Function> x}) Function<B extends core.int>(
       int x) x14;
   Function([int x]) Function<B extends core.int>(int x) x15;
   Function(List<Function> x1) Function<B extends core.int>(int x) x16;
   Function(int x, [List<T> x1]) Function<B extends core.int>(int x) x17;
   void Function(int x1, {Function x}) Function<B extends core.int>(int x) x18;
   void Function([List<T> x]) Function<B extends core.int>(int x) x19;
   Function Function<A>(A x) Function<B extends core.int>(int x) x20;
   List<T> Function<A>(List<A> x) Function<B extends core.int>(int x) x21;
@@ skipping 162 matching lines @@
     int Function(int x2, [int x3]) Function<B extends core.int>(int x) l4;
     // The static function f4 sets `T` to `int`.
     if (!tIsBool) {
       x4 = f4 as dynamic;
       l4 = f4 as dynamic;
       x4 = confuse(f4);
       l4 = confuse(f4);
     }
 
     Expect.isTrue(m4 is F4);
-    Expect.isTrue(m4 is int Function(int x2,
-        [int x3]) Function<B extends core.int>(int x));
+    Expect.isTrue(m4 is int Function(int x2, [int x3])
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m4) is F4);
     // In checked mode, verifies the type.
     x4 = m4;
     l4 = m4;
     x4 = confuse(m4);
     l4 = confuse(m4);
   }
 
   /// int Function(int x1, {List<Function> x}) Function<B extends core.int>(int x)
   void testF5() {
     Expect.isTrue(f5 is F5);
     Expect.isTrue(confuse(f5) is F5);
     // In checked mode, verifies the type.
     int Function(int x1, {List<Function> x}) Function<B extends core.int>(int x)
         l5;
     // The static function f5 sets `T` to `int`.
     if (!tIsBool) {
       x5 = f5 as dynamic;
       l5 = f5 as dynamic;
       x5 = confuse(f5);
       l5 = confuse(f5);
     }
 
     Expect.isTrue(m5 is F5);
-    Expect.isTrue(m5 is int Function(int x1,
-        {List<Function> x}) Function<B extends core.int>(int x));
+    Expect.isTrue(m5 is int Function(int x1, {List<Function> x})
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m5) is F5);
     // In checked mode, verifies the type.
     x5 = m5;
     l5 = m5;
     x5 = confuse(m5);
     l5 = confuse(m5);
   }
 
   /// Function Function(int x) Function<B extends core.int>(int x)
   void testF6() {
@@ skipping 29 matching lines @@
         int x) l7;
     // The static function f7 sets `T` to `int`.
     if (!tIsBool) {
       x7 = f7 as dynamic;
       l7 = f7 as dynamic;
       x7 = confuse(f7);
       l7 = confuse(f7);
     }
 
     Expect.isTrue(m7 is F7);
-    Expect.isTrue(m7 is Function Function(int y,
-        [List<Function> x]) Function<B extends core.int>(int x));
+    Expect.isTrue(m7 is Function Function(int y, [List<Function> x])
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m7) is F7);
     // In checked mode, verifies the type.
     x7 = m7;
     l7 = m7;
     x7 = confuse(m7);
     l7 = confuse(m7);
   }
 
   /// Function Function(int x2, [List<T> x3]) Function<B extends core.int>(int x)
   void testF8() {
     Expect.isTrue(f8 is F8);
     Expect.isTrue(confuse(f8) is F8);
     // In checked mode, verifies the type.
     Function Function(int x2, [List<T> x3]) Function<B extends core.int>(int x)
         l8;
     // The static function f8 sets `T` to `int`.
     if (!tIsBool) {
       x8 = f8 as dynamic;
       l8 = f8 as dynamic;
       x8 = confuse(f8);
       l8 = confuse(f8);
     }
 
     Expect.isTrue(m8 is F8);
-    Expect.isTrue(m8 is Function Function(int x2,
-        [List<T> x3]) Function<B extends core.int>(int x));
+    Expect.isTrue(m8 is Function Function(int x2, [List<T> x3])
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m8) is F8);
     // In checked mode, verifies the type.
     x8 = m8;
     l8 = m8;
     x8 = confuse(m8);
     l8 = confuse(m8);
     if (!tIsBool) {
       Expect.isTrue(f8 is F8<int>);
       Expect.isFalse(f8 is F8<bool>);
       Expect.isTrue(confuse(f8) is F8<int>);
       Expect.isFalse(confuse(f8) is F8<bool>);
       Expect.equals(tIsDynamic, m8 is F8<bool>);
       Expect.equals(tIsDynamic, confuse(m8) is F8<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x8 = (f8 as dynamic);
         });
         Expect.throws(() {
           x8 = confuse(f8);
         });
         Function Function(int x2, [List<T> x3]) Function<B extends core.int>(
             int x) l8;
         Expect.throws(() {
           l8 = (f8 as dynamic);
@@ skipping 19 matching lines @@
         l9;
     // The static function f9 sets `T` to `int`.
     if (!tIsBool) {
       x9 = f9 as dynamic;
       l9 = f9 as dynamic;
       x9 = confuse(f9);
       l9 = confuse(f9);
     }
 
     Expect.isTrue(m9 is F9);
-    Expect.isTrue(m9 is List<Function> Function(
-        {Function x}) Function<B extends core.int>(int x));
+    Expect.isTrue(m9 is List<Function> Function({Function x})
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m9) is F9);
     // In checked mode, verifies the type.
     x9 = m9;
     l9 = m9;
     x9 = confuse(m9);
     l9 = confuse(m9);
   }
 
   /// List<Function> Function(List<T> x) Function<B extends core.int>(int x)
   void testF10() {
     Expect.isTrue(f10 is F10);
     Expect.isTrue(confuse(f10) is F10);
     // In checked mode, verifies the type.
     List<Function> Function(List<T> x) Function<B extends core.int>(int x) l10;
     // The static function f10 sets `T` to `int`.
     if (!tIsBool) {
       x10 = f10 as dynamic;
       l10 = f10 as dynamic;
       x10 = confuse(f10);
       l10 = confuse(f10);
     }
 
     Expect.isTrue(m10 is F10);
-    Expect.isTrue(m10 is List<Function> Function(
-        List<T> x) Function<B extends core.int>(int x));
+    Expect.isTrue(m10 is List<Function> Function(List<T> x)
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m10) is F10);
     // In checked mode, verifies the type.
     x10 = m10;
     l10 = m10;
     x10 = confuse(m10);
     l10 = confuse(m10);
     if (!tIsBool) {
       Expect.isTrue(f10 is F10<int>);
       Expect.isFalse(f10 is F10<bool>);
       Expect.isTrue(confuse(f10) is F10<int>);
       Expect.isFalse(confuse(f10) is F10<bool>);
       Expect.equals(tIsDynamic, m10 is F10<bool>);
       Expect.equals(tIsDynamic, confuse(m10) is F10<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x10 = (f10 as dynamic);
         });
         Expect.throws(() {
           x10 = confuse(f10);
         });
         List<Function> Function(List<T> x) Function<B extends core.int>(int x)
             l10;
         Expect.throws(() {
           l10 = (f10 as dynamic);
         });
         Expect.throws(() {
           l10 = confuse(f10);
         });
       }
       List<Function> Function(List<T> x) Function<B extends core.int>(int x)
           l10 = m10;
       // In checked mode, verifies the type.
       x10 = m10;
       x10 = confuse(m10);
     }
   }
 
   /// core.List<core.int> Function(int x1, [Function x]) Function<B extends core.int>(int x)
   void testF11() {
     Expect.isTrue(f11 is F11);
     Expect.isTrue(confuse(f11) is F11);
     // In checked mode, verifies the type.
-    core.List<core.int> Function(int x1,
-        [Function x]) Function<B extends core.int>(int x) l11;
+    core.List<core.int> Function(int x1, [Function x])
+        Function<B extends core.int>(int x) l11;
     // The static function f11 sets `T` to `int`.
     if (!tIsBool) {
       x11 = f11 as dynamic;
       l11 = f11 as dynamic;
       x11 = confuse(f11);
       l11 = confuse(f11);
     }
 
     Expect.isTrue(m11 is F11);
-    Expect.isTrue(m11 is core.List<core.int> Function(int x1,
-        [Function x]) Function<B extends core.int>(int x));
+    Expect.isTrue(m11 is core.List<core.int> Function(int x1, [Function x])
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m11) is F11);
     // In checked mode, verifies the type.
     x11 = m11;
     l11 = m11;
     x11 = confuse(m11);
     l11 = confuse(m11);
   }
 
   /// core.List<core.int> Function([core.List<core.int> x1]) Function<B extends core.int>(int x)
   void testF12() {
     Expect.isTrue(f12 is F12);
     Expect.isTrue(confuse(f12) is F12);
     // In checked mode, verifies the type.
-    core.List<core.int> Function(
-        [core.List<core.int> x1]) Function<B extends core.int>(int x) l12;
+    core.List<core.int> Function([core.List<core.int> x1])
+        Function<B extends core.int>(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(
-        [core.List<core.int> x1]) Function<B extends core.int>(int x));
+    Expect.isTrue(m12 is core.List<core.int> Function([core.List<core.int> x1])
+        Function<B extends core.int>(int x));
     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, [int x1]) Function<B extends core.int>(int x)
   void testF13() {
     Expect.isTrue(f13 is F13);
     Expect.isTrue(confuse(f13) is F13);
     // In checked mode, verifies the type.
     List<T> Function(int x, [int x1]) Function<B extends core.int>(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 List<T> Function(int x,
-        [int x1]) Function<B extends core.int>(int x));
+    Expect.isTrue(m13 is List<T> Function(int x, [int x1])
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m13) is F13);
     // In checked mode, verifies the type.
     x13 = m13;
     l13 = m13;
     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, [int x1]) Function<B extends core.int>(int x)
             l13;
         Expect.throws(() {
           l13 = (f13 as dynamic);
@@ skipping 19 matching lines @@
         int x) l14;
     // The static function f14 sets `T` to `int`.
     if (!tIsBool) {
       x14 = f14 as dynamic;
       l14 = f14 as dynamic;
       x14 = confuse(f14);
       l14 = confuse(f14);
     }
 
     Expect.isTrue(m14 is F14);
-    Expect.isTrue(m14 is List<T> Function(int y,
-        {List<Function> x}) Function<B extends core.int>(int x));
+    Expect.isTrue(m14 is List<T> Function(int y, {List<Function> x})
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m14) is F14);
     // In checked mode, verifies the type.
     x14 = m14;
     l14 = m14;
     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<B extends core.int>(int x) l14;
+        List<T> Function(int y, {List<Function> x})
+            Function<B extends core.int>(int x) l14;
         Expect.throws(() {
           l14 = (f14 as dynamic);
         });
         Expect.throws(() {
           l14 = confuse(f14);
         });
       }
       List<T> Function(int y, {List<Function> x}) Function<B extends core.int>(
           int x) l14 = m14;
       // In checked mode, verifies the type.
@@ skipping 59 matching lines @@
     Function(int x, [List<T> x1]) Function<B extends core.int>(int x) l17;
     // The static function f17 sets `T` to `int`.
     if (!tIsBool) {
       x17 = f17 as dynamic;
       l17 = f17 as dynamic;
       x17 = confuse(f17);
       l17 = confuse(f17);
     }
 
     Expect.isTrue(m17 is F17);
-    Expect.isTrue(m17 is Function(int x,
-        [List<T> x1]) Function<B extends core.int>(int x));
+    Expect.isTrue(m17 is Function(int x, [List<T> x1])
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m17) is F17);
     // In checked mode, verifies the type.
     x17 = m17;
     l17 = m17;
     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(int x, [List<T> x1]) Function<B extends core.int>(int x) l17;
         Expect.throws(() {
           l17 = (f17 as dynamic);
         });
@@ skipping 17 matching lines @@
     void Function(int x1, {Function x}) Function<B extends core.int>(int x) l18;
     // The static function f18 sets `T` to `int`.
     if (!tIsBool) {
       x18 = f18 as dynamic;
       l18 = f18 as dynamic;
       x18 = confuse(f18);
       l18 = confuse(f18);
     }
 
     Expect.isTrue(m18 is F18);
-    Expect.isTrue(m18 is void Function(int x1,
-        {Function x}) Function<B extends core.int>(int x));
+    Expect.isTrue(m18 is void Function(int x1, {Function x})
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m18) is F18);
     // In checked mode, verifies the type.
     x18 = m18;
     l18 = m18;
     x18 = confuse(m18);
     l18 = confuse(m18);
   }
 
   /// void Function([List<T> x]) Function<B extends core.int>(int x)
   void testF19() {
@@ skipping 19 matching lines @@
     x19 = confuse(m19);
     l19 = confuse(m19);
     if (!tIsBool) {
       Expect.isTrue(f19 is F19<int>);
       Expect.isFalse(f19 is F19<bool>);
       Expect.isTrue(confuse(f19) is F19<int>);
       Expect.isFalse(confuse(f19) is F19<bool>);
       Expect.equals(tIsDynamic, m19 is F19<bool>);
       Expect.equals(tIsDynamic, confuse(m19) is F19<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x19 = (f19 as dynamic);
         });
         Expect.throws(() {
           x19 = confuse(f19);
         });
         void Function([List<T> x]) Function<B extends core.int>(int x) l19;
         Expect.throws(() {
           l19 = (f19 as dynamic);
         });
@@ skipping 41 matching lines @@
     List<T> Function<A>(List<A> x) Function<B extends core.int>(int x) l21;
     // The static function f21 sets `T` to `int`.
     if (!tIsBool) {
       x21 = f21 as dynamic;
       l21 = f21 as dynamic;
       x21 = confuse(f21);
       l21 = confuse(f21);
     }
 
     Expect.isTrue(m21 is F21);
-    Expect.isTrue(m21 is List<T> Function<A>(
-        List<A> x) Function<B extends core.int>(int x));
+    Expect.isTrue(m21 is List<T> Function<A>(List<A> x)
+        Function<B extends core.int>(int x));
     Expect.isTrue(confuse(m21) is F21);
     // In checked mode, verifies the type.
     x21 = m21;
     l21 = m21;
     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>(List<A> x) Function<B extends core.int>(int x) l21;
         Expect.throws(() {
           l21 = (f21 as dynamic);
         });
@@ skipping 33 matching lines @@
     x22 = confuse(m22);
     l22 = confuse(m22);
   }
 }
 
 void main() {
   new U91().runTests();
   new U91<int>(tIsInt: true).runTests();
   new U91<bool>(tIsBool: true).runTests();
 }