Add support for super aliases to new emitter.

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

Index: pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart b/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
index 9f4538222f9b6e80497279692cf87b06f8bb5495..b8faa26265c7ffd09dd999e4dab06245614ac387 100644
--- a/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.dart
@@ -418,7 +418,7 @@ function parseFunctionDescriptor(proto, name, desc) {
     proto[name] = desc[0];
     var funs = [desc[0]];
     funs[0].$callName = desc[1];
-    for (var pos = 4; pos < desc.length; pos += 3) {
+    for (var pos = 5; pos < desc.length; pos += 3) {
       var stub = desc[pos+2];
       stub.$callName = desc[pos+1];
       proto[desc[pos]] = stub;
@@ -427,13 +427,17 @@ function parseFunctionDescriptor(proto, name, desc) {
     if (desc[2] != null) {
       proto[desc[2]] = tearOff(funs, desc[3], false, name, false);
     }
+    // Install the alias for super calls on the prototype chain.
+    if (desc[4] != null) {
+      proto[desc[4]] = desc[0];
+    }
   } else {
     proto[name] = desc;
   }
 }
 """;
 
-  Iterable<js.Expression> emitInstanceMethod(Method method) {
+  Iterable<js.Expression> emitInstanceMethod(InstanceMethod method) {
 
     List<js.Expression> makeNameCodePair(Method method) {
       return [js.string(method.name), method.code];
@@ -447,13 +451,18 @@ function parseFunctionDescriptor(proto, name, desc) {
     }
 
     if (method is DartMethod) {
-      if (method.needsTearOff) {
-        // [name, [function, callName, tearOffName, functionType,
+      if (method.needsTearOff || method.superAlias != null) {
+        // [name, [function, callName, tearOffName, functionType, aliasName,
         //     stub1_name, stub1_callName, stub1_code, ...]
         var data = [method.code];
         data.add(js.string(method.callName));
         data.add(js.string(method.tearOffName));
         data.add(new js.LiteralNull());
+        if (method.superAlias != null) {
+          data.add(js.string(method.superAlias));
+        } else {
+          data.add(new js.LiteralNull());
+        }
         data.addAll(method.adapterStubs.expand(makeNameCallNameCodeTriplet));
         return [js.string(method.name), new js.ArrayInitializer(data)];
       } else {