Serialize more native data.

pkg/compiler/lib/src/js_emitter/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 dart2js.js_emitter;
 
 class NativeEmitter {
   // TODO(floitsch): the native-emitter should not know about ClassBuilders.
   final Map<Element, full_js_emitter.ClassBuilder> cachedBuilders;
 
@@ skipping 17 matching lines @@
         directSubtypes = new Map<ClassElement, List<ClassElement>>(),
         nativeMethods = new Set<FunctionElement>(),
         cachedBuilders = emitterTask.compiler.cacheStrategy.newMap();
 
   Compiler get compiler => emitterTask.compiler;
 
   JavaScriptBackend get backend => compiler.backend;
 
   BackendHelpers get helpers => backend.helpers;
 
-  jsAst.Expression get defPropFunction {

[Johnni Winther, 2016/04/19 11:04:59]

Unused (found while investigating why 'defineProperty' wasn't processed)

-    Element element = helpers.defineProperty;
-    return emitterTask.staticFunctionAccess(element);
-  }
-
   /**
    * Prepares native classes for emission. Returns the unneeded classes.
    *
    * Removes trivial classes (that can be represented by a super type) and
    * generates properties that have to be added to classes (native or not).
    *
    * Updates the `nativeLeafTags`, `nativeNonLeafTags` and `nativeExtensions`
    * fields of the given classes. This data must be emitted with the
    * corresponding classes.
    *
@@ skipping 301 matching lines @@
     // used.  We should also use an interceptor if the check can't be satisfied
     // by a native class in case we get a native instance that tries to spoof
     // the type info.  i.e the criteria for whether or not to use an interceptor
     // is whether the receiver can be native, not the type of the test.
     if (element == null || !element.isClass) return false;
     ClassElement cls = element;
     if (backend.isNativeOrExtendsNative(cls)) return true;
     return isSupertypeOfNativeClass(element);
   }
 }