Improvements to NoSuchMethodError.toString

tests/language/vm/no_such_method_error_message_vm_test.dart

Index: tests/language/vm/no_such_method_error_message_vm_test.dart
diff --git a/tests/language/vm/no_such_method_error_message_vm_test.dart b/tests/language/vm/no_such_method_error_message_vm_test.dart
index 6be273811482c7ad0cfe001c06d9268209c36673..259a13a045fabe4a445570df023933c5aeb841bb 100644
--- a/tests/language/vm/no_such_method_error_message_vm_test.dart
+++ b/tests/language/vm/no_such_method_error_message_vm_test.dart
@@ -6,7 +6,7 @@
 import "package:expect/expect.dart";
 
 // Test error message with noSuchMethodError: non-existent names
-// should result in a "method not found" message.
+// should result in a message that reports the missing method.
 
 call_bar(x) => x.bar();
 
@@ -14,7 +14,7 @@ testMessage() {
   try {
     call_bar(5);
   } catch (e) {
-    Expect.isTrue(e.toString().indexOf("method not found") != -1);
+    Expect.isTrue(e.toString().indexOf("has no instance method 'bar'") != -1);
   }
 }