Add the JS helper function to all libraries where we allow the native syntax.

lib/compiler/implementation/native_handler.dart

Index: lib/compiler/implementation/native_handler.dart
diff --git a/lib/compiler/implementation/native_handler.dart b/lib/compiler/implementation/native_handler.dart
index 8e2b688b59653dc096f6997cc9ba0f4809750890..8592b03be9d7b0cb08543242e23b7caa2ba2229d 100644
--- a/lib/compiler/implementation/native_handler.dart
+++ b/lib/compiler/implementation/native_handler.dart
@@ -81,15 +81,11 @@ void maybeEnableNative(Compiler compiler,
       || libraryName == 'dart:isolate'
       || libraryName == 'dart:html') {
     library.canUseNative = true;
+    library.define(compiler.findHelper(const SourceString('JS')), compiler);

[Lasse Reichstein Nielsen, 2012/07/04 13:49:44]

Maybe we should extend the map in library_map.dart to a proper central "dart
library configuration", so we can store information like this in there too. 
It seems better than having per-library information smattered all over the code
base.

     if (compiler.jsIndexingBehaviorInterface !== null) {
       library.define(compiler.jsIndexingBehaviorInterface, compiler);
     }
   }
-
-  // Additionaly, if this is a test, we allow access to foreign functions.
-  if (library.script.name.contains('dart/tests/compiler/dart2js_native')) {
-    library.define(compiler.findHelper(const SourceString('JS')), compiler);
-  }
 }
 
 void checkAllowedLibrary(ElementListener listener, Token token) {