Canonical output ordering for constants.

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

Index: pkg/compiler/lib/src/js_emitter/lazy_emitter/model_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/lazy_emitter/model_emitter.dart b/pkg/compiler/lib/src/js_emitter/lazy_emitter/model_emitter.dart
index 485195ee92768c3d71cfb130ca70d760b05f4239..96838acd777085862c3102e24640a8cd5e9b6da4 100644
--- a/pkg/compiler/lib/src/js_emitter/lazy_emitter/model_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/lazy_emitter/model_emitter.dart
@@ -21,6 +21,7 @@ import '../../js_backend/js_backend.dart' show
     ConstantEmitter;
 
 import '../js_emitter.dart' show NativeEmitter;
+import '../constant_ordering.dart' show deepCompareConstants;
 
 import 'package:js_runtime/shared/embedded_names.dart' show
     CREATE_NEW_ISOLATE,
@@ -108,9 +109,9 @@ class ModelEmitter {
     // which compresses a tiny bit better.
     int r = namer.constantLongName(a).compareTo(namer.constantLongName(b));
     if (r != 0) return r;
-    // Resolve collisions in the long name by using the constant name (i.e. JS
-    // name) which is unique.
-    return namer.constantName(a).compareTo(namer.constantName(b));
+
+    // Resolve collisions in the long name by using a structural order.
+    return deepCompareConstants(a, b);
   }
 
   js.Expression generateStaticClosureAccess(FunctionElement element) {