Support for global var shortcuts in script contexts.

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 147f5624f29b90cec19bb05d41047875ac15adeb..d795b3ce166ae54af87e623553386faf888cc25f 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -2095,7 +2095,7 @@ Variable* Parser::Declare(Declaration* declaration,
     // TODO(sigurds) figure out if kNotAssigned is OK here
     var = new (zone()) Variable(declaration_scope, name, mode, kind,
                                 declaration->initialization(), kNotAssigned);
-    var->AllocateTo(Variable::LOOKUP, -1);
+    var->AllocateTo(VariableLocation::LOOKUP, -1);
     resolve = true;
   }