InvocationMirror implemented in dart2js.

lib/compiler/implementation/enqueue.dart

Index: lib/compiler/implementation/enqueue.dart
diff --git a/lib/compiler/implementation/enqueue.dart b/lib/compiler/implementation/enqueue.dart
index 0e97273d4f827585537d6668d78255c2602422ba..ac9e993a81dd07f181ea2a5239aa0d72a8c81c49 100644
--- a/lib/compiler/implementation/enqueue.dart
+++ b/lib/compiler/implementation/enqueue.dart
@@ -247,6 +247,11 @@ class Enqueuer {
       String message = "$name != ${selector.name} (${selector.kind})";
       compiler.internalError("Wrong selector name: $message.");
     }
+    if (!compiler.enabledInvokeOn && name == Compiler.INVOKE_ON) {
+      if (selector.applies(compiler.invokeOnMethod, compiler)) {

[bakster, 2012/10/24 13:43:04]

Why two if statements when you have three expressions.
Consider using one if. 

[Johnni Winther, 2012/10/25 13:34:56]

Test removed.

+        compiler.enabledInvokeOn = true;
+      }
+    }
     Set<Selector> selectors =
         selectorsMap.putIfAbsent(name, () => new Set<Selector>());
     if (!selectors.contains(selector)) {