Fix test now that we also go through an interceptor for operator[].

tests/compiler/dart2js/type_inference_test.dart

Index: tests/compiler/dart2js/type_inference_test.dart
===================================================================
--- tests/compiler/dart2js/type_inference_test.dart	(revision 16094)
+++ tests/compiler/dart2js/type_inference_test.dart	(working copy)
@@ -29,6 +29,7 @@
 
 const String TEST_THREE = r"""
 foo(a) {
+  print([]);

[kasperl, 2012/12/13 12:08:58]

Add comment: // Force a list to be instantiated.

   for (int b = 0; b < 10; b++) print(a[b]);
 }
 """;
@@ -49,6 +50,7 @@
 
 const String TEST_FIVE_WITH_BAILOUT = r"""
 foo(a) {
+  print([]);

[kasperl, 2012/12/13 12:08:58]

Ditto.

   for (int i = 0; i < 1; i++) {
     a[0] = 1;
     print(a[1]);
@@ -58,6 +60,7 @@
 
 const String TEST_SIX = r"""
 foo(a) {
+  print([]);

[kasperl, 2012/12/13 12:08:58]

Ditto.

   print(a[0]);
   while (true) {
     a[0] = a[1];