Add "environment" parameter to spawnUri for String.fromEnvironment support.

sdk/lib/_internal/js_runtime/lib/isolate_patch.dart

Index: sdk/lib/_internal/js_runtime/lib/isolate_patch.dart
diff --git a/sdk/lib/_internal/js_runtime/lib/isolate_patch.dart b/sdk/lib/_internal/js_runtime/lib/isolate_patch.dart
index 70eda5b5e973708798fe729f2faf6b5eec296c82..a5d491ebaeb30fe6e0cfdcc3c7dfbd4f1cb6cc90 100644
--- a/sdk/lib/_internal/js_runtime/lib/isolate_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/isolate_patch.dart
@@ -64,11 +64,14 @@ class Isolate {
       Uri uri, List<String> args, var message,
       {bool paused: false,
        bool checked,
+       Map<String, String> environment,
        Uri packageRoot,
        Map<String, Uri> packages,
        bool errorsAreFatal,
        SendPort onExit,
        SendPort onError}) {
+        if (environment != null) {
+    if (environment != null) throw new UnimplementedError("environment");

[kevmoo, 2015/09/17 16:55:14]

missing close } on 'if'

also: alignment

[Siggi Cherem (dart-lang), 2015/09/17 17:06:57]

since the condition is repeated here too, delete line 73 entirely?

[Lasse Reichstein Nielsen, 2015/09/22 09:05:39]

Absolutely, 'twas a bad paste error, at best.

     if (packageRoot != null) throw new UnimplementedError("packageRoot");
     if (packages != null) throw new UnimplementedError("packages");
     bool forcePause = (errorsAreFatal != null) ||