dart2js: Support frequency based metadata indices in new emitter.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index 76d382a35ac40aeeb529cd34a2ffd6c80a23db01..dd67097e2a59f9321b8c3e0896e7b9df0e0bafbf 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -1654,8 +1654,8 @@ function(originalDescriptor, name, holder, isStatic, globalFunctionsAccess) {
 
   void finalizeTokensInAst(jsAst.Program main,
                            Iterable<jsAst.Program> deferredParts) {
-    task.metadataCollector.countTokensInProgram(main);
-    deferredParts.forEach(task.metadataCollector.countTokensInProgram);
+    task.metadataCollector.countTokensInAst(main);
+    deferredParts.forEach(task.metadataCollector.countTokensInAst);
     task.metadataCollector.finalizeTokens();
   }