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 71eeaa2e5080acb2d731782c6d756af111f4d382..cb978335af636c347a0a1dd72b987bea4f4c343e 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7319,6 +7319,9 @@ 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();
@@ -7536,6 +7539,7 @@ class SharedFunctionInfo: public HeapObject {
     kDontCache,
     kDontFlush,
     kIsGenerator,
+    kIsArrow,
     kCompilerHintsCount  // Pseudo entry
   };