Emit declarations for typedefs that are needed by reflection.

sdk/lib/_internal/compiler/implementation/js_backend/native_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.
 
 part of js_backend;
 
 class NativeEmitter {
 
   final Map<Element, ClassBuilder> cachedBuilders;
 
@@ skipping 226 matching lines @@
     }
 
     // Emit the native class interceptors that were actually used.
     for (ClassElement classElement in classes) {
       if (!classElement.isNative) continue;
       if (neededClasses.contains(classElement)) {
         // Define interceptor class for [classElement].
         emitter.classEmitter.emitClassBuilderWithReflectionData(
             backend.namer.getNameOfClass(classElement),
             classElement, builders[classElement],
-            emitter.getElementDecriptor(classElement));
+            emitter.getElementDescriptor(classElement));
         emitter.needsDefineClass = true;
       }
     }
   }
 
   /**
    * Computes the native classes that are extended (subclassed) by non-native
    * classes and the set non-mative classes that extend them.  (A List is used
    * instead of a Set for out stability).
    */
@@ skipping 214 matching lines @@
       if (emitter.compiler.enableMinification) targetBuffer.add(';');
       targetBuffer.add(jsAst.prettyPrint(
           new jsAst.ExpressionStatement(init), compiler));
       targetBuffer.add('\n');
     }
 
     targetBuffer.add(nativeBuffer);
     targetBuffer.add('\n');
   }
 }