Frog shouldn't read libraries with --leg_only.

dart/frog/frog_options.dart

Index: dart/frog/frog_options.dart
diff --git a/dart/frog/frog_options.dart b/dart/frog/frog_options.dart
index 231f30ada384f54e46b06f85d7d279f243342a54..175f724a966b247ba7b755fbac37fc3692bb661a 100644
--- a/dart/frog/frog_options.dart
+++ b/dart/frog/frog_options.dart
@@ -27,7 +27,6 @@ class FrogOptions {
 
 
   // Options that modify behavior significantly
-  bool enableLeg = false;
   bool legOnly = false;
   bool enableAsserts = false;
   bool enableTypeChecks = false;
@@ -83,12 +82,9 @@ class FrogOptions {
       var arg = args[i];
 
       switch (arg) {
+        case '--leg':

[ngeoffray, 2012/02/09 09:14:21]

Should we remove the other flags?

[ahe, 2012/02/09 10:05:33]

In a few days. Right now we have an open VM bug that uses these options.

         case '--enable_leg':
-          enableLeg = true;
-          break;
-
         case '--leg_only':
-          enableLeg = true;
           legOnly = true;
           break;