Fix type variables in closures.

tests/language/type_variable_closure_test.dart

Index: tests/language/type_variable_closure_test.dart
diff --git a/tests/language/call_argument_inference_test.dart b/tests/language/type_variable_closure_test.dart
similarity index 65%
copy from tests/language/call_argument_inference_test.dart
copy to tests/language/type_variable_closure_test.dart
index 0af5537d58ddb8eacad9f37bbbb5e0adc8295f3c..22560710e61d244c0241f5b1a91aec52cc57d877 100644
--- a/tests/language/call_argument_inference_test.dart
+++ b/tests/language/type_variable_closure_test.dart
@@ -4,11 +4,14 @@
 
 import "package:expect/expect.dart";
 
-class A {
-  call(a) => a is num;
+class C<T> {
+  C.foo() {
+    x = (a) => a is T;
+  }
+  var x;
 }
 
 main() {
-  Expect.isTrue(new A().call(42));
-  Expect.isFalse(new A()('foo'));
+  Expect.isTrue(new C<int>.foo().x(1));
+  Expect.isFalse(new C<int>.foo().x('1'));
 }