Support implicitly bound closures (aka. tear-off closures).

frog/leg/compiler.dart

Index: frog/leg/compiler.dart
diff --git a/frog/leg/compiler.dart b/frog/leg/compiler.dart
index 584742b17d43be38cb4074e6fed9d9b0b6004b98..35ff15a87e2a604df43fd462f12ccc874b5287bb 100644
--- a/frog/leg/compiler.dart
+++ b/frog/leg/compiler.dart
@@ -206,6 +206,11 @@ class Compiler implements DiagnosticListener {
                 }
               }
             }
+            // If there is a property access with the same name as a method we
+            // need to emit the method.
+            if (universe.invokedGetters.contains(member.name)) {
+              addToWorklist(member);
+            }
           } else if (member.kind == ElementKind.GETTER) {
             if (universe.invokedGetters.contains(member.name)) {
               addToWorklist(member);