Implement handling of arrow functions in the parser

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 8ef7f20231f5e5a0d77bae8321462db95affe69e..1f3791a098b48c09e2c8f74deb15ab9021a27ad1 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7117,6 +7117,9 @@ class SharedFunctionInfo: public HeapObject {
   // Indicates that this function is a generator.
   DECL_BOOLEAN_ACCESSORS(is_generator)
 
+  // Indicated that this function is an arrow function.
+  DECL_BOOLEAN_ACCESSORS(is_arrow)
+
   // Indicates whether or not the code in the shared function support
   // deoptimization.
   inline bool has_deoptimization_support();
@@ -7322,6 +7325,7 @@ class SharedFunctionInfo: public HeapObject {
     kDontCache,
     kDontFlush,
     kIsGenerator,
+    kIsArrow,
     kCompilerHintsCount  // Pseudo entry
   };