Also use the redirecting name in stubs for native methods.

lib/compiler/implementation/native_emitter.dart

Index: lib/compiler/implementation/native_emitter.dart
===================================================================
--- lib/compiler/implementation/native_emitter.dart	(revision 7782)
+++ lib/compiler/implementation/native_emitter.dart	(working copy)
@@ -26,10 +26,12 @@
   // to its subclass if it sees an instance whose class is a subclass.
   Set<FunctionElement> overriddenMethods;
 
-  // Caches the methods that should just call a native JS
-  // implementation.
+  // Caches the methods that have a native body.
   Set<FunctionElement> nativeMethods;
 
+  // Caches the methods that redirect to a JS method.
+  Map<FunctionElement, String> redirectingMethods;
+
   NativeEmitter(this.emitter)
       : classesWithDynamicDispatch = new Set<ClassElement>(),
         nativeClasses = new Set<ClassElement>(),
@@ -37,10 +39,15 @@
         directSubtypes = new Map<ClassElement, List<ClassElement>>(),
         overriddenMethods = new Set<FunctionElement>(),
         nativeMethods = new Set<FunctionElement>(),
+        redirectingMethods = new Map<FunctionElement, String>(),
         nativeBuffer = new StringBuffer();
 
   Compiler get compiler() => emitter.compiler;
 
+  void addRedirectingMethod(FunctionElement element, String name) {
+    redirectingMethods[element] = name;
+  }
+
   String get dynamicName() {
     Element element = compiler.findHelper(
         const SourceString('dynamicFunction'));
@@ -207,7 +214,8 @@
       code.add('  return this.${compiler.namer.getName(member)}($arguments)');
     } else {
       // When calling a JS method, we call it with the native name.
-      String name = member.name.slowToString();
+      String name = redirectingMethods[member];
+      if (name === null) name = member.name.slowToString();
       code.add('  return this.$name($nativeArguments);');
     }