ES6 symbols: turn symbols into a proper primitive type

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index ce58a86cf5de1e8fbc529a3fbe9a3522b137ffe0..380c81e13abd608c17ff3aa7e6fbdfa7fc94d4c8 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1280,7 +1280,17 @@ void Genesis::InitializeExperimentalGlobal() {
   Handle<JSObject> global = Handle<JSObject>(native_context()->global_object());
 
   // TODO(mstarzinger): Move this into Genesis::InitializeGlobal once we no
-  // longer need to live behind a flag, so functions get added to the snapshot.
+  // longer need to live behind flags, so functions get added to the snapshot.
+
+  if (FLAG_harmony_symbols) {
+    // --- S y m b o l ---
+    Handle<JSFunction> symbol_fun =
+        InstallFunction(global, "Symbol", JS_VALUE_TYPE, JSValue::kSize,
+                        isolate()->initial_object_prototype(),
+                        Builtins::kIllegal, true);
+    native_context()->set_symbol_function(*symbol_fun);
+  }
+
   if (FLAG_harmony_collections) {
     {  // -- S e t
       Handle<JSObject> prototype =
@@ -1436,9 +1446,6 @@ void Genesis::InstallNativeFunctions() {
 }
 
 void Genesis::InstallExperimentalNativeFunctions() {
-  if (FLAG_harmony_symbols) {
-    INSTALL_NATIVE(JSObject, "SymbolDelegate", symbol_delegate);
-  }
   if (FLAG_harmony_proxies) {
     INSTALL_NATIVE(JSFunction, "DerivedHasTrap", derived_has_trap);
     INSTALL_NATIVE(JSFunction, "DerivedGetTrap", derived_get_trap);