Update dart2js diagnostics to prepare for filtering.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
index 5f49bd6c1ecc7a850afea139825f842af57df44a..7a47b50e9b3d929c8813e2bad563ff94a5a05288 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -4793,7 +4793,8 @@ abstract class SsaFromAstMixin
   visitNodeList(NodeList node) {
     for (Link<Node> link = node.nodes; !link.isEmpty; link = link.tail) {
       if (isAborted()) {
-        compiler.reportWarning(link.head, 'dead code');
+        compiler.reportWarning(link.head,
+            MessageKind.GENERIC, {'text': 'dead code'});
       } else {
         visit(link.head);
       }