Add support for super aliases to new emitter.

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

Index: pkg/compiler/lib/src/js_emitter/model.dart
diff --git a/pkg/compiler/lib/src/js_emitter/model.dart b/pkg/compiler/lib/src/js_emitter/model.dart
index 8532b38c46a9996a5d8157c50e43bb33d8158ca1..16e74d69426afc5bd196654e28a921da6d096b40 100644
--- a/pkg/compiler/lib/src/js_emitter/model.dart
+++ b/pkg/compiler/lib/src/js_emitter/model.dart
@@ -359,7 +359,7 @@ class DartMethod extends Method {
 
 class InstanceMethod extends DartMethod {
   // TODO(herhut): Directly store aliases instead.
-  final bool hasSuperAlias;
+  final String superAlias;

[floitsch, 2015/01/30 18:31:05]

Explain what this is, and what the emitter has to do with it.

   final bool isClosure;
 
   InstanceMethod(Element element, String name, js.Expression code,
@@ -367,7 +367,7 @@ class InstanceMethod extends DartMethod {
                  String callName,
                  {bool needsTearOff,
                   String tearOffName,
-                  this.hasSuperAlias,
+                  this.superAlias,
                   bool canBeApplied,
                   bool canBeReflected,
                   this.isClosure,
@@ -378,7 +378,6 @@ class InstanceMethod extends DartMethod {
               canBeApplied: canBeApplied,
               canBeReflected: canBeReflected,
               needsStubs: needsStubs) {
-    assert(hasSuperAlias != null);
     assert(isClosure != null);
   }
 }