Don't tag fromEnvironment constructors as native

pkg/compiler/lib/src/js_backend/backend.dart

Index: pkg/compiler/lib/src/js_backend/backend.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend.dart b/pkg/compiler/lib/src/js_backend/backend.dart
index 97ececbf2d984dcdfa70bd0b95b1be502bda6416..08d1645cce0c3f5956420b825ba7b72beffd10cf 100644
--- a/pkg/compiler/lib/src/js_backend/backend.dart
+++ b/pkg/compiler/lib/src/js_backend/backend.dart
@@ -1072,7 +1072,8 @@ class JavaScriptBackend {
 
   /// Returns `true` if the `native` pseudo keyword is supported for [library].
   bool canLibraryUseNative(LibraryEntity library) {
-    return native.maybeEnableNative(compiler, library);
+    return native.maybeEnableNative(library.canonicalUri,
+        allowNativeExtensions: compiler.options.allowNativeExtensions);
   }
 
   bool isTargetSpecificLibrary(LibraryElement library) {