[modules] Move runtime functions into new file (runtime-module.cc).

src/runtime/runtime-module.cc

+// Copyright 2016 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.
+
+#include "src/runtime/runtime-utils.h"
+
+#include "src/arguments.h"
+
+namespace v8 {
+namespace internal {
+
+RUNTIME_FUNCTION(Runtime_GetModuleNamespace) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_SMI_ARG_CHECKED(module_request, 0);
+  Handle<Module> module(isolate->context()->module());
+  return *Module::GetModuleNamespace(module, module_request);
+}
+
+RUNTIME_FUNCTION(Runtime_LoadModuleExport) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
+  Handle<Module> module(isolate->context()->module());
+  return *Module::LoadExport(module, name);
+}
+
+RUNTIME_FUNCTION(Runtime_LoadModuleImport) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
+  CONVERT_SMI_ARG_CHECKED(module_request, 1);
+  Handle<Module> module(isolate->context()->module());
+  return *Module::LoadImport(module, name, module_request);
+}
+
+RUNTIME_FUNCTION(Runtime_StoreModuleExport) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
+  Handle<Module> module(isolate->context()->module());
+  Module::StoreExport(module, name, value);
+  return isolate->heap()->undefined_value();
+}
+
+}  // namespace internal
+}  // namespace v8