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 34edd0a7419ad64f56c875aca0298d3b9f79c8b1..ce76a1952e626d9a5828fba371296d792d7a5c73 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6998,6 +6998,9 @@ 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();
@@ -7211,6 +7214,7 @@ class SharedFunctionInfo: public HeapObject {
     kDontCache,
     kDontFlush,
     kIsGenerator,
+    kIsArrow,
     kCompilerHintsCount  // Pseudo entry
   };