Prefix resolution_types with Resolution.

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

Index: pkg/compiler/lib/src/js_emitter/constant_ordering.dart
diff --git a/pkg/compiler/lib/src/js_emitter/constant_ordering.dart b/pkg/compiler/lib/src/js_emitter/constant_ordering.dart
index 3a6d06b28372c3b3f26ebf4de552b7a22bb29e71..19917267c6bfadbca24bbe0074779a3d26bf686e 100644
--- a/pkg/compiler/lib/src/js_emitter/constant_ordering.dart
+++ b/pkg/compiler/lib/src/js_emitter/constant_ordering.dart
@@ -51,7 +51,7 @@ class _CompareVisitor implements ConstantValueVisitor<int, ConstantValue> {
     return Elements.compareByPosition(a, b);
   }
 
-  static int compareDartTypes(DartType a, DartType b) {
+  static int compareDartTypes(ResolutionDartType a, ResolutionDartType b) {
     if (a == b) return 0;
     int r = a.kind.index.compareTo(b.kind.index);
     if (r != 0) return r;