Enable ES6 Symbols by default

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index e58bf5abdb43b79699b32fea96f7fc6f340dfd08..a8381c6234c8695629be073775f5a3192a319080 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1177,6 +1177,14 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> global_object,
     ASSERT(IsFastObjectElementsKind(map->elements_kind()));
   }
 
+  {
+    // --- S y m b o l ---
+    Handle<JSFunction> symbol_fun = InstallFunction(
+        global, "Symbol", JS_VALUE_TYPE, JSValue::kSize,
+        isolate->initial_object_prototype(), Builtins::kIllegal);
+    native_context()->set_symbol_function(*symbol_fun);
+  }
+
   {  // --- aliased arguments map
     Handle<Map> map = Map::Copy(isolate->sloppy_arguments_map());
     map->set_elements_kind(SLOPPY_ARGUMENTS_ELEMENTS);
@@ -1308,14 +1316,6 @@ void Genesis::InitializeExperimentalGlobal() {
   // TODO(mstarzinger): Move this into Genesis::InitializeGlobal once we no
   // 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);
-    native_context()->set_symbol_function(*symbol_fun);
-  }
-
   if (FLAG_harmony_collections) {
     // -- M a p
     InstallFunction(global, "Map", JS_MAP_TYPE, JSMap::kSize,
@@ -1583,6 +1583,7 @@ void Genesis::InstallNativeFunctions() {
                  native_object_get_notifier);
   INSTALL_NATIVE(JSFunction, "NativeObjectNotifierPerformChange",
                  native_object_notifier_perform_change);
+  INSTALL_NATIVE(Symbol, "symbolIterator", iterator_symbol);
 }
 
 
@@ -1593,10 +1594,6 @@ void Genesis::InstallExperimentalNativeFunctions() {
     INSTALL_NATIVE(JSFunction, "DerivedSetTrap", derived_set_trap);
     INSTALL_NATIVE(JSFunction, "ProxyEnumerate", proxy_enumerate);
   }
-
-  if (FLAG_harmony_symbols) {
-    INSTALL_NATIVE(Symbol, "symbolIterator", iterator_symbol);
-  }
 }
 
 #undef INSTALL_NATIVE
@@ -2013,7 +2010,6 @@ bool Genesis::InstallExperimentalNatives() {
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount();
        i++) {
-    INSTALL_EXPERIMENTAL_NATIVE(i, symbols, "symbol.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, proxies, "proxy.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, collections, "collection.js")
     INSTALL_EXPERIMENTAL_NATIVE(i, collections, "collection-iterator.js")