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

tests/language/function_type/function_type53_test.dart

Index: tests/language/function_type/function_type53_test.dart
diff --git a/tests/language/function_type/function_type53_test.dart b/tests/language/function_type/function_type53_test.dart
index 39d7193a64e9be717625f479ccd38360b7c53fee..6cc0babfc1a033818a743f241b3fad90dda4d922 100644
--- a/tests/language/function_type/function_type53_test.dart
+++ b/tests/language/function_type/function_type53_test.dart
@@ -19,58 +19,32 @@ 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 x0, {List<T> x});
-typedef F1<T>
-    = List<Function> Function({core.List<core.int> x});
-typedef F2<T>
-    = List<T> Function(int x, [List<Function> x2]);
-typedef F3<T>
-    = void Function(int x1, [Function x2]);
-typedef F4<T>
-    = List<A> Function<A>();
-typedef F5<T>
-    = int Function(List<Function> x) Function(int x);
-typedef F6<T>
-    = int Function(int y, [List<T> x]) Function(int x);
-typedef F7<T>
-    = Function Function([Function x1]) Function(int x);
-typedef F8<T>
-    = Function Function({core.List<core.int> x}) Function(int x);
-typedef F9<T>
-    = List<Function> Function(int y, {int x}) Function(int x);
-typedef F10<T>
-    = List<Function> Function(int x1, [core.List<core.int> x]) Function(int x);
-typedef F11<T>
-    = core.List<core.int> Function(int x1) Function(int x);
-typedef F12<T>
-    = core.List<core.int> Function(int x, [List<Function> x1]) Function(int x);
-typedef F13<T>
-    = core.List<core.int> Function(int y, {List<T> x}) Function(int x);
-typedef F14<T>
-    = List<T> Function([List<Function> x]) Function(int x);
-typedef F15<T>
-    = List<T> Function(List<T> x1) Function(int x);
-typedef F16<T>
-    = Function(int x2, [Function x3]) Function(int x);
-typedef F17<T>
-    = Function(int x1, {core.List<core.int> x}) Function(int x);
-typedef F18<T>
-    = void Function(Function x) Function(int x);
-typedef F19<T>
-    = void Function(int y, [core.List<core.int> x]) Function(int x);
-typedef F20<T>
-    = int Function<A>() Function(int x);
-typedef F21<T>
-    = core.List<core.int> Function<A>(A x) Function(int x);
-typedef F22<T>
-    = A Function<A>(List<A> x) Function(int x);
+typedef F0<T> = int Function(int x0, {List<T> x});
+typedef F1<T> = List<Function> Function({core.List<core.int> x});
+typedef F2<T> = List<T> Function(int x, [List<Function> x2]);
+typedef F3<T> = void Function(int x1, [Function x2]);
+typedef F4<T> = List<A> Function<A>();
+typedef F5<T> = int Function(List<Function> x) Function(int x);
+typedef F6<T> = int Function(int y, [List<T> x]) Function(int x);
+typedef F7<T> = Function Function([Function x1]) Function(int x);
+typedef F8<T> = Function Function({core.List<core.int> x}) Function(int x);
+typedef F9<T> = List<Function> Function(int y, {int x}) Function(int x);
+typedef F10<T> = List<Function> Function(int x1, [core.List<core.int> x])
+    Function(int x);
+typedef F11<T> = core.List<core.int> Function(int x1) Function(int x);
+typedef F12<T> = core.List<core.int> Function(int x, [List<Function> x1])
+    Function(int x);
+typedef F13<T> = core.List<core.int> Function(int y, {List<T> x}) Function(
+    int x);
+typedef F14<T> = List<T> Function([List<Function> x]) Function(int x);
+typedef F15<T> = List<T> Function(List<T> x1) Function(int x);
+typedef F16<T> = Function(int x2, [Function x3]) Function(int x);
+typedef F17<T> = Function(int x1, {core.List<core.int> x}) Function(int x);
+typedef F18<T> = void Function(Function x) Function(int x);
+typedef F19<T> = void Function(int y, [core.List<core.int> x]) Function(int x);
+typedef F20<T> = int Function<A>() Function(int x);
+typedef F21<T> = core.List<core.int> Function<A>(A x) Function(int x);
+typedef F22<T> = A Function<A>(List<A> x) Function(int x);
 
 int f0(int x0, {List<int> x}) => null;
 List<Function> f1({core.List<core.int> x}) => null;
@@ -208,7 +182,7 @@ class U53<T> {
       Expect.equals(tIsDynamic, m0 is F0<bool>);
       Expect.equals(tIsDynamic, confuse(m0) is F0<bool>);
     } else {
-      if (inCheckedMode) {
+      if (typeAssertionsEnabled) {
         Expect.throws(() {
           x0 = (f0 as dynamic);
         });
@@ -284,7 +258,7 @@ class U53<T> {
       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);
         });
@@ -408,7 +382,7 @@ class U53<T> {
       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);
         });
@@ -521,7 +495,8 @@ class U53<T> {
 
     Expect.isTrue(m10 is F10);
     Expect.isTrue(m10 is List<Function> Function(int x1,
-        [core.List<core.int> x]) Function(int x));
+            [core.List<core.int> x])
+        Function(int x));
     Expect.isTrue(confuse(m10) is F10);
     // In checked mode, verifies the type.
     x10 = m10;
@@ -571,7 +546,8 @@ class U53<T> {
 
     Expect.isTrue(m12 is F12);
     Expect.isTrue(m12 is core.List<core.int> Function(int x,
-        [List<Function> x1]) Function(int x));
+            [List<Function> x1])
+        Function(int x));
     Expect.isTrue(confuse(m12) is F12);
     // In checked mode, verifies the type.
     x12 = m12;
@@ -595,8 +571,8 @@ class U53<T> {
     }
 
     Expect.isTrue(m13 is F13);
-    Expect.isTrue(m13 is core.List<core.int> Function(int y,
-        {List<T> x}) Function(int x));
+    Expect.isTrue(m13 is core.List<core.int> Function(int y, {List<T> x})
+        Function(int x));
     Expect.isTrue(confuse(m13) is F13);
     // In checked mode, verifies the type.
     x13 = m13;
@@ -611,7 +587,7 @@ class U53<T> {
       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);
         });
@@ -664,7 +640,7 @@ class U53<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);
         });
@@ -716,7 +692,7 @@ class U53<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);
         });