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

tests/language/function_type/function_type8_test.dart

Index: tests/language/function_type/function_type8_test.dart
diff --git a/tests/language/function_type/function_type8_test.dart b/tests/language/function_type/function_type8_test.dart
index c1461f87750540acecb5b3fc9836300df86476a0..a0b0a1101e1c1d4e4252f5bcf66dc9bac6f01334 100644
--- a/tests/language/function_type/function_type8_test.dart
+++ b/tests/language/function_type/function_type8_test.dart
@@ -19,60 +19,31 @@ import 'package:expect/expect.dart';
 @AssumeDynamic()
 confuse(f) => f;
 
-final bool inCheckedMode = (() {
-  bool result = false;
-  assert(result = true);
-  return result;
-})();
-
-typedef F0<T>
-    = int Function({int x});
-typedef F1<T>
-    = Function Function({List<T> x});
-typedef F2<T>
-    = core.List<core.int> Function(int x, [core.List<core.int> x2]);
-typedef F3<T>
-    = Function(int x1, [List<Function> x2]);
-typedef F4<T>
-    = List<Function> Function<A>(int x);
-typedef F5<T>
-    = int Function(Function x) Function();
-typedef F6<T>
-    = int Function(int y, [core.List<core.int> x]) Function();
-typedef F7<T>
-    = Function Function([int x1]) Function();
-typedef F8<T>
-    = Function Function({List<Function> x}) Function();
-typedef F9<T>
-    = Function Function() Function();
-typedef F10<T>
-    = List<Function> Function(int x0, [List<Function> x]) Function();
-typedef F11<T>
-    = List<Function> Function([List<T> x1]) Function();
-typedef F12<T>
-    = core.List<core.int> Function(int x, [Function x2]) Function();
-typedef F13<T>
-    = core.List<core.int> Function(int y, {core.List<core.int> x}) Function();
-typedef F14<T>
-    = List<T> Function([Function x]) Function();
-typedef F15<T>
-    = List<T> Function(core.List<core.int> x0) Function();
-typedef F16<T>
-    = Function(int x1, [int x2]) Function();
-typedef F17<T>
-    = Function(int x0, {List<Function> x}) Function();
-typedef F18<T>
-    = void Function(int x) Function();
-typedef F19<T>
-    = void Function(int y, [List<Function> x]) Function();
-typedef F20<T>
-    = void Function(int x1, [List<T> x2]) Function();
-typedef F21<T>
-    = List<Function> Function<A>(core.List<core.int> x) Function();
-typedef F22<T>
-    = Function<A>(List<T> x) Function();
-typedef F23<T>
-    = void Function<A>() Function();
+typedef F0<T> = int Function({int x});
+typedef F1<T> = Function Function({List<T> x});
+typedef F2<T> = core.List<core.int> Function(int x, [core.List<core.int> x2]);
+typedef F3<T> = Function(int x1, [List<Function> x2]);
+typedef F4<T> = List<Function> Function<A>(int x);
+typedef F5<T> = int Function(Function x) Function();
+typedef F6<T> = int Function(int y, [core.List<core.int> x]) Function();
+typedef F7<T> = Function Function([int x1]) Function();
+typedef F8<T> = Function Function({List<Function> x}) Function();
+typedef F9<T> = Function Function() Function();
+typedef F10<T> = List<Function> Function(int x0, [List<Function> x]) Function();
+typedef F11<T> = List<Function> Function([List<T> x1]) Function();
+typedef F12<T> = core.List<core.int> Function(int x, [Function x2]) Function();
+typedef F13<T> = core.List<core.int> Function(int y, {core.List<core.int> x})
+    Function();
+typedef F14<T> = List<T> Function([Function x]) Function();
+typedef F15<T> = List<T> Function(core.List<core.int> x0) Function();
+typedef F16<T> = Function(int x1, [int x2]) Function();
+typedef F17<T> = Function(int x0, {List<Function> x}) Function();
+typedef F18<T> = void Function(int x) Function();
+typedef F19<T> = void Function(int y, [List<Function> x]) Function();
+typedef F20<T> = void Function(int x1, [List<T> x2]) Function();
+typedef F21<T> = List<Function> Function<A>(core.List<core.int> x) Function();
+typedef F22<T> = Function<A>(List<T> x) Function();
+typedef F23<T> = void Function<A>() Function();
 
 int f0({int x}) => null;
 Function f1({List<int> x}) => null;
@@ -238,7 +209,7 @@ class U8<T> {
       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);
         });
@@ -509,7 +480,7 @@ class U8<T> {
       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);
         });
@@ -572,7 +543,8 @@ class U8<T> {
 
     Expect.isTrue(m13 is F13);
     Expect.isTrue(m13 is core.List<core.int> Function(int y,
-        {core.List<core.int> x}) Function());
+            {core.List<core.int> x})
+        Function());
     Expect.isTrue(confuse(m13) is F13);
     // In checked mode, verifies the type.
     x13 = m13;
@@ -611,7 +583,7 @@ class U8<T> {
       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);
         });
@@ -663,7 +635,7 @@ class U8<T> {
       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);
         });
@@ -811,7 +783,7 @@ class U8<T> {
       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);
         });
@@ -888,7 +860,7 @@ class U8<T> {
       Expect.equals(tIsDynamic, m22 is F22<bool>);
       Expect.equals(tIsDynamic, confuse(m22) is F22<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x22 = (f22 as dynamic);
         });