Canonical output ordering for constants.

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

Index: pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
index 7abae77453072725cfc516457b948ff3321a62a8..b16379f5465ca7a8aa2e072146d7a0ab08a2734e 100644
--- a/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart
@@ -17,6 +17,7 @@ import '../js_emitter.dart' hide Emitter;
 import '../js_emitter.dart' as js_emitter show Emitter;
 import '../model.dart';
 import '../program_builder/program_builder.dart';
+import '../constant_ordering.dart' show deepCompareConstants;
 
 import '../../common.dart';
 import '../../common/names.dart' show
@@ -252,11 +253,9 @@ class Emitter implements js_emitter.Emitter {
     // 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.
-    // TODO(herhut): Find a better way to resolve collisions.
-    return namer.constantName(a).hashCode.compareTo(
-        namer.constantName(b).hashCode);
+
+    // Resolve collisions in the long name by using a structural order.
+    return deepCompareConstants(a, b);
   }
 
   @override