Prefix resolution_types with Resolution.

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

Index: pkg/compiler/lib/src/js_emitter/native_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/native_emitter.dart b/pkg/compiler/lib/src/js_emitter/native_emitter.dart
index 1f3980298ed9c105b9657c53fae312570053c5e3..b782831ba9d004f83e184455571c150292c29c83 100644
--- a/pkg/compiler/lib/src/js_emitter/native_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/native_emitter.dart
@@ -264,11 +264,11 @@ class NativeEmitter {
       // parameter that was not provided for this stub.
       for (jsAst.Parameter stubParameter in stubParameters) {
         if (stubParameter.name == name) {
-          DartType type = parameter.type.unaliased;
-          if (type is FunctionType) {
+          ResolutionDartType type = parameter.type.unaliased;
+          if (type is ResolutionFunctionType) {
             // The parameter type is a function type either directly or through
             // typedef(s).
-            FunctionType functionType = type;
+            ResolutionFunctionType functionType = type;
             int arity = functionType.computeArity();
             statements.add(js
                 .statement('# = #(#, $arity)', [name, closureConverter, name]));