[esnext] prototype runtime implementation for async functions

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index bd228352721af48b312261da81d55c6c07bcb758..b8538d6b481285312528716aeeeb54b64e5975ec 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -2409,6 +2409,17 @@ void Bootstrapper::ExportFromRuntime(Isolate* isolate,
           script_is_embedder_debug_script, attribs);
       script_map->AppendDescriptor(&d);
     }
+
+    {
+      Handle<JSFunction> async_function_next =
+          SimpleInstallFunction(container, "AsyncFunctionNext",
+                                Builtins::kAsyncFunctionNext, 2, false);
+      Handle<JSFunction> async_function_throw =
+          SimpleInstallFunction(container, "AsyncFunctionThrow",
+                                Builtins::kAsyncFunctionThrow, 2, false);
+      async_function_next->shared()->set_native(true);
+      async_function_throw->shared()->set_native(true);
+    }
   }
 }
 
@@ -2501,8 +2512,6 @@ void Genesis::InitializeGlobal_harmony_sharedarraybuffer() {
 
   SimpleInstallFunction(atomics_object, factory->InternalizeUtf8String("load"),
                         Builtins::kAtomicsLoad, 2, true);
-  SimpleInstallFunction(atomics_object, factory->InternalizeUtf8String("store"),
-                        Builtins::kAtomicsStore, 3, true);
 }
 
 
@@ -3019,7 +3028,8 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_exponentiation_operator_natives[] = {nullptr};
   static const char* harmony_string_padding_natives[] = {
       "native harmony-string-padding.js", nullptr};
-  static const char* harmony_async_await_natives[] = {nullptr};
+  static const char* harmony_async_await_natives[] = {
+      "native harmony-async-await.js", nullptr};
 
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount(); i++) {