Remove reference to ObjectNotClosureException in dart2js.

tests/language/call_through_null_getter_test.dart

Index: tests/language/call_through_null_getter_test.dart
diff --git a/tests/language/call_through_null_getter_test.dart b/tests/language/call_through_null_getter_test.dart
index 72b33acc28424e884898a75686f24efeb15fb781..05024964b817595059a0ad24df89482e4a4cbea8 100644
--- a/tests/language/call_through_null_getter_test.dart
+++ b/tests/language/call_through_null_getter_test.dart
@@ -19,51 +19,43 @@ class CallThroughNullGetterTest {
 
   static void testTopLevel() {
     topLevel = null;
-    expectThrowsObjectNotClosureException(() { topLevel(); });
-    expectThrowsObjectNotClosureException(() { (topLevel)(); });
-    expectThrowsObjectNotClosureException(() { TOP_LEVEL_NULL(); });
-    expectThrowsObjectNotClosureException(() { (TOP_LEVEL_NULL)(); });
+    expectThrowsNullPointerException(() { topLevel(); });
+    expectThrowsNullPointerException(() { (topLevel)(); });
+    expectThrowsNullPointerException(() { TOP_LEVEL_NULL(); });
+    expectThrowsNullPointerException(() { (TOP_LEVEL_NULL)(); });
   }
 
   static void testField() {
     A a = new A();
 
     a.field = null;
-    expectThrowsObjectNotClosureException(() { a.field(); });
-    expectThrowsObjectNotClosureException(() { (a.field)(); });
+    expectThrowsNullPointerException(() { a.field(); });
+    expectThrowsNullPointerException(() { (a.field)(); });
   }
 
   static void testGetter() {
     A a = new A();
 
     a.field = null;
-    expectThrowsObjectNotClosureException(() { a.getter(); });
-    expectThrowsObjectNotClosureException(() { (a.getter)(); });
+    expectThrowsNullPointerException(() { a.getter(); });
+    expectThrowsNullPointerException(() { (a.getter)(); });
   }
 
   static void testMethod() {
     A a = new A();
 
     a.field = null;
-    expectThrowsObjectNotClosureException(() { a.method()(); });
+    expectThrowsNullPointerException(() { a.method()(); });
   }
 
   static void expectThrowsNullPointerException(fn) {
     var exception = catchException(fn);
-    if (!(exception is NullPointerException)) {
+    if (exception is! NullPointerException) {
       Expect.fail("Wrong exception.  Expected: NullPointerException"
           " got: ${exception}");
     }
   }
 
-  static void expectThrowsObjectNotClosureException(fn) {
-    var exception = catchException(fn);
-    if (!(exception is ObjectNotClosureException)) {
-      Expect.fail("Wrong exception.  Expected: ObjectNotClosureException"
-          " got: ${exception}");
-    }
-  }
-
   static catchException(fn) {
     bool caught = false;
     var result = null;