dart2js: Address comments from CL 871073002.

pkg/compiler/lib/src/js_emitter/program_builder.dart

Index: pkg/compiler/lib/src/js_emitter/program_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder.dart b/pkg/compiler/lib/src/js_emitter/program_builder.dart
index 0f1f7ee778973a896c8a8e0b66b05599d37e9e05..a2fc45a1a0d00586c514bac55a3c4c33337c1a25 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder.dart
@@ -278,25 +278,20 @@ class ProgramBuilder {
                        staticFieldsForReflection);
   }
 
-  /// HACK for Try.
+  /// HACK for Incremental Compilation.
   ///
   /// Returns a class that contains the fields of a class.
-  Class buildClassWithFieldsForTry(ClassElement element) {
-    bool onlyForRti = _task.typeTestRegistry.rtiNeededClasses.contains(element);
+  Class buildClassWithFieldsForIncrementalCompilation(ClassElement element) {
+    assert(_compiler.hasIncrementalSupport);
 
-    List<Field> instanceFields =
-        onlyForRti ? const <Field>[] : _buildFields(element, false);
+    List<Field> instanceFields = _buildFields(element, false);
 
     String name = namer.getNameOfClass(element);
-    String holderName = namer.globalObjectFor(element);
-    Holder holder = _registry.registerHolder(holderName);
-    bool isInstantiated =
-        _compiler.codegenWorld.directlyInstantiatedClasses.contains(element);
 
     return new Class(
-        element, name, holder, [], instanceFields, [], [], [], null,
-        isDirectlyInstantiated: isInstantiated,
-        onlyForRti: onlyForRti,
+        element, name, null, [], instanceFields, [], [], [], null,
+        isDirectlyInstantiated: true,
+        onlyForRti: false,
         isNative: element.isNative);
   }