Cleanups needed for this-scoping in arrow functions

src/variables.cc

Index: src/variables.cc
diff --git a/src/variables.cc b/src/variables.cc
index dd67052663e2699667bfa92f5aadc73fc2d2487b..4f1f589ebee9617e298a354cf309ed0059df64c0 100644
--- a/src/variables.cc
+++ b/src/variables.cc
@@ -33,8 +33,7 @@ const char* Variable::Mode2String(VariableMode mode) {
 
 
 Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode,
-                   bool is_valid_ref, Kind kind,
-                   InitializationFlag initialization_flag,
+                   Kind kind, InitializationFlag initialization_flag,
                    MaybeAssignedFlag maybe_assigned_flag)
     : scope_(scope),
       name_(name),
@@ -44,7 +43,6 @@ Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode,
       index_(-1),
       initializer_position_(RelocInfo::kNoPosition),
       local_if_not_shadowed_(NULL),
-      is_valid_ref_(is_valid_ref),
       force_context_allocation_(false),
       is_used_(false),
       initialization_flag_(initialization_flag),