Emit declarations for typedefs that are needed by reflection.

sdk/lib/_internal/compiler/implementation/js_emitter/class_emitter.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;
 
 class ClassEmitter extends CodeEmitterHelper {
   /**
    * Documentation wanted -- johnniwinther
    *
@@ skipping 62 matching lines @@
         fields.add(name);
       });
     }
     String constructorName = namer.getNameOfClass(classElement);
 
     // TODO(sra): Implement placeholders in VariableDeclaration position:
     //     task.precompiledFunction.add(js.statement('function #(#) { #; }',
     //        [ constructorName, fields,
     //            fields.map(
     //                (name) => js('this.# = #', [name, name]))]));
-    task.precompiledFunction.add(
-        new jsAst.FunctionDeclaration(
-            new jsAst.VariableDeclaration(constructorName),
-            js('function(#) { #; }',
-                [fields,
-                 fields.map((name) => js('this.# = #', [name, name]))])));
-    // TODO(floitsch): do we actually need the name field?
-    // TODO(floitsch): these should all go through the namer.
-
-    task.precompiledFunction.add(
-        js.statement(r'''{
-          #.builtin$cls = #;
-          if (!"name" in #)
-              #.name = #;
-          $desc=$collectedClasses.#;
-          if ($desc instanceof Array) $desc = $desc[1];
-          #.prototype = $desc;
-        }''',
-            [   constructorName, js.string(constructorName),
-                constructorName,
-                constructorName, js.string(constructorName),
-                constructorName,
-                constructorName
-             ]));
-
-    task.precompiledConstructorNames.add(js('#', constructorName));
+    jsAst.Expression constructorAst = js('function(#) { #; }',
+        [fields,
+         fields.map((name) => js('this.# = #', [name, name]))]);
+    task.emitPrecompiledConstructor(constructorName, constructorAst);
   }
 
   /// Returns `true` if fields added.
   bool emitFields(Element element,
                   ClassBuilder builder,
                   String superName,
                   { bool classIsNative: false,
                     bool emitStatics: false,
                     bool onlyForRti: false }) {
     assert(!emitStatics || !onlyForRti);
@@ skipping 503 matching lines @@
           js(r'this.$builtinTypeInfo && this.$builtinTypeInfo[#]', index);
     }
     jsAst.Expression convertRtiToRuntimeType =
         namer.elementAccess(backend.findHelper('convertRtiToRuntimeType'));
     compiler.dumpInfoTask.registerElementAst(element,
         builder.addProperty(name,
             js('function () { return #(#) }',
                 [convertRtiToRuntimeType, computeTypeVariable])));
   }
 }