Begin refactoring compiler out of diet parser and scanner

pkg/compiler/lib/src/closure.dart

Index: pkg/compiler/lib/src/closure.dart
diff --git a/pkg/compiler/lib/src/closure.dart b/pkg/compiler/lib/src/closure.dart
index 70ce85f6951943bf51789b7aef25d904ef9a6025..2d0ee9978392aaab089b9cd05f0a4bf5eb672b49 100644
--- a/pkg/compiler/lib/src/closure.dart
+++ b/pkg/compiler/lib/src/closure.dart
@@ -185,7 +185,7 @@ class ClosureClassElement extends ClassElementX {
             // By assigning a fresh class-id we make sure that the hashcode
             // is unique, but also emit closure classes after all other
             // classes (since the emitter sorts classes by their id).
-            compiler.getNextFreeClassId(),
+            compiler.getNextFreeId(),
             STATE_DONE) {
     JavaScriptBackend backend = compiler.backend;
     ClassElement superclass = methodElement.isInstanceMember