Put "super" in quotes.

dart/lib/compiler/implementation/js_backend/emitter.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
 class ClosureInvocationElement extends FunctionElement {
   ClosureInvocationElement(SourceString name,
@@ skipping 549 matching lines @@
     }
     String constructorName = namer.safeName(classElement.name.slowToString());
 
     buffer.add('$classesCollector.$className = {"":\n');
     buffer.add(' [');
     emitClassFields(classElement, buffer);
     buffer.add('],\n');
     // TODO(floitsch): the emitInstanceMember should simply always emit a ',\n'.
     // That does currently not work because the native classes have a different
     // syntax.
-    buffer.add(' super: "$superName"');
+    buffer.add(' "super": "$superName"');
     emitInstanceMembers(classElement, buffer, true);
     buffer.add('\n};\n\n');
   }
 
   void generateTypeTests(ClassElement cls,
                          void generateTypeTest(ClassElement element)) {
     if (compiler.codegenWorld.isChecks.contains(cls)) {
       generateTypeTest(cls);
     }
     generateInterfacesIsTests(cls, generateTypeTest, new Set<Element>());
@@ skipping 586 matching lines @@
         sourceName = token.slowToString();
       }
       int totalOffset = bufferOffset + offset;
       sourceMapBuilder.addMapping(
           sourceFile, token.charOffset, sourceName, totalOffset);
     });
   }
 }
 
 typedef void DefineMemberFunction(String invocationName, CodeBuffer definition);