dart2js: Add an empty "MANGLED_NAMES" embedded global to the startup-emitter.

pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart

 // Copyright (c) 2015, 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.startup_emitter.model_emitter;
 
 /// The fast startup emitter's goal is to minimize the amount of work that the
 /// JavaScript engine has to do before it can start running user code.
 ///
 /// Whenever possible, the emitter uses object literals instead of updating
@@ skipping 1002 matching lines @@
       // same JavaScript context (except for testing) this shouldn't have any
       // impact on real-world programs, though.
       globals.add(
           new js.Property(js.string(CREATE_NEW_ISOLATE),
           js.js('function () { return $staticStateName; }')));
       // TODO(floitsch): add remaining isolate functions.
     }
 
     globals.add(emitMangledGlobalNames());
 
+    // The [MANGLED_NAMES] table is only relevant for reflection.
+    // TODO(floitsch): verify that this is correct.
+    globals.add(new js.Property(js.string(MANGLED_NAMES),
+                                new js.ObjectInitializer([])));
+
     globals.add(emitGetTypeFromName());
 
     globals.addAll(emitMetadata(program));
 
     if (program.needsNativeSupport) {
       globals.add(new js.Property(js.string(INTERCEPTORS_BY_TAG),
           new js.LiteralNull()));
       globals.add(new js.Property(js.string(LEAF_TAGS),
           new js.LiteralNull()));
     }
@@ skipping 62 matching lines @@
     }
     statements.add(js.js.statement("setOrUpdateInterceptorsByTag(#);",
         js.objectLiteral(interceptorsByTag)));
     statements.add(js.js.statement("setOrUpdateLeafTags(#);",
         js.objectLiteral(leafTags)));
     statements.add(subclassAssignment);
 
     return new js.Block(statements);
   }
 }