Add a --harmony-species flag, defining @@species on constructors

src/heap/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 358 matching lines @@
   V(promise_status_symbol)                  \
   V(promise_value_symbol)                   \
   V(sealed_symbol)                          \
   V(stack_trace_symbol)                     \
   V(strict_function_transition_symbol)      \
   V(string_iterator_iterated_string_symbol) \
   V(string_iterator_next_index_symbol)      \
   V(strong_function_transition_symbol)      \
   V(uninitialized_symbol)
 
-#define PUBLIC_SYMBOL_LIST(V)                 \
-  V(has_instance_symbol, Symbol.hasInstance)  \
-  V(iterator_symbol, Symbol.iterator)         \
-  V(match_symbol, Symbol.match)               \
-  V(replace_symbol, Symbol.replace)           \
-  V(search_symbol, Symbol.search)             \
-  V(split_symbol, Symbol.split)               \
-  V(to_primitive_symbol, Symbol.toPrimitive)  \
+#define PUBLIC_SYMBOL_LIST(V)                \
+  V(has_instance_symbol, Symbol.hasInstance) \
+  V(iterator_symbol, Symbol.iterator)        \
+  V(match_symbol, Symbol.match)              \
+  V(replace_symbol, Symbol.replace)          \
+  V(search_symbol, Symbol.search)            \
+  V(species_symbol, Symbol.species)          \
+  V(split_symbol, Symbol.split)              \
+  V(to_primitive_symbol, Symbol.toPrimitive) \
   V(unscopables_symbol, Symbol.unscopables)
 
 // Well-Known Symbols are "Public" symbols, which have a bit set which causes
 // them to produce an undefined value when a load results in a failed access
 // check. Because this behaviour is not specified properly as of yet, it only
 // applies to a subset of spec-defined Well-Known Symbols.
 #define WELL_KNOWN_SYMBOL_LIST(V)                           \
   V(is_concat_spreadable_symbol, Symbol.isConcatSpreadable) \
   V(to_string_tag_symbol, Symbol.toStringTag)
 
@@ skipping 2355 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_