Move nativeInfo encoding into NativeGenerator.

pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart

Index: pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart b/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
index f8d369589eabcc76ce8fe19cabca17410b9b8b61..34205dca87ab7973394289fcf51bb5fd2dbaef1c 100644
--- a/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
@@ -253,7 +253,8 @@ class ModelEmitter {
         generateEmbeddedGlobalAccess(INTERCEPTORS_BY_TAG);
     js.Expression leafTagsAccess =
         generateEmbeddedGlobalAccess(LEAF_TAGS);
-    js.Statement nativeInfoHandler = nativeEmitter.buildNativeInfoHandler(
+    NativeGenerator generator = new NativeGenerator();
+    js.Statement nativeInfoHandler = generator.buildNativeInfoHandler(
         nativeInfoAccess,
         constructorAccess,
         subclassReadGenerator,
@@ -591,10 +592,11 @@ class ModelEmitter {
       js.Literal name = js.quoteName(cls.name);
       js.LiteralNumber holderIndex = js.number(cls.holder.index);
       js.Expression emittedClass = emitClass(cls);
-      if (cls.nativeInfo == null) {
+      js.Expression nativeInfo = new NativeGenerator.encodeNativeInfo(cls);
+      if (nativeInfo == null) {
         return [name, emittedClass, holderIndex];
       } else {
-        return [name, emittedClass, cls.nativeInfo, holderIndex];
+        return [name, emittedClass, nativeInfo, holderIndex];
       }
     });