Implement handling of arrow functions in the parser

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index fcb4918839ffb699c4ed6bc63880eb345a4c27e9..60d7e4096d85f35c3cf937381d96f09cfc6daa36 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -1863,12 +1863,14 @@ Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(
     Handle<String> name,
     int number_of_literals,
     bool is_generator,
+    bool is_arrow,
     Handle<Code> code,
     Handle<ScopeInfo> scope_info,
     Handle<FixedArray> feedback_vector) {
   Handle<SharedFunctionInfo> shared = NewSharedFunctionInfo(name, code);
   shared->set_scope_info(*scope_info);
   shared->set_feedback_vector(*feedback_vector);
+  shared->set_is_arrow(is_arrow);
   int literals_array_size = number_of_literals;
   // If the function contains object, regexp or array literals,
   // allocate extra space for a literals array prefix containing the