dart2js: Use JS_GET_NAME instead of magic constant for catch-all function.

pkg/compiler/lib/src/js_emitter/full_emitter/setup_program_builder.dart

 // Copyright (c) 2013, 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.
 
 part of dart2js.js_emitter.full_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
@@ skipping 729 matching lines @@
           if (getterStubName) mangledNames[getterStubName] = reflectionName;
           if (isSetter) {
             reflectionName += "=";
           } else if (!isGetter) {
             reflectionName += ":" + 
                 (requiredParameterCount + optionalParameterCount);
           }
           mangledNames[name] = reflectionName;
           funcs[0].$reflectionNameField = reflectionName;
           funcs[0].$metadataIndexField = unmangledNameIndex + 1;
+          // The following line installs the [${JsGetName.CALL_CATCH_ALL}]
+          // property for closures.
           if (optionalParameterCount) prototype[unmangledName + "*"] = funcs[0];
         }
       }
     }
 
     #tearOffCode;
   }
 
   if (#hasIncrementalSupport) {
     #incrementalHelper.addStubs = addStubs;
@@ skipping 86 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }