Avoid emitting addStubs and tearOffCode when not needed.

pkg/compiler/lib/src/js_emitter/old_emitter/container_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;
 
 /// This class should morph into something that makes it easy to build
 /// JavaScript representations of libraries, class-sides, and instance-sides.
 /// Initially, it is just a placeholder for code that is moved from
 /// [CodeEmitterTask].
@@ skipping 434 matching lines @@
         addParameterStubs(
             member,
             (Selector selector, jsAst.Fun function) {
               compiler.dumpInfoTask.registerElementAst(member,
                   builder.addProperty(namer.invocationName(selector),
                                       function));
             });
       }
       return;
     }
-
+    emitter.needsArrayInitializerSupport = true;
 
     // This element is needed for reflection or needs additional stubs or has a
     // super alias. So we need to retain additional information.
 
     // The information is stored in an array with this format:
     //
     // 1.   The alias name for this function (optional).
     // 2.   The JS function for this member.
     // 3.   First stub.
     // 4.   Name of first stub.
@@ skipping 202 matching lines @@
     assert(needsStubs != null);
     assert(canTearOff != null);
     assert(isClosure != null);
     assert(tearOffName != null || !canTearOff);
     assert(canBeReflected != null);
     assert(canBeApplied != null);
     assert(hasSuperAlias != null);
     assert(needStructuredInfo != null);
   }
 }