[WIP Prototype] ES6 https://html.spec.whatwg.org/#fetch-a-single-module-script implementation

third_party/WebKit/Source/core/loader/modulescript/ModuleScriptLoaderClient.h

+// Copyright 2017 The Chromium 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 ModuleScriptLoaderClient_h
+#define ModuleScriptLoaderClient_h
+
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class ModuleScript;
+
+// A ModuleScriptLoaderClient is notified when a single module script load is
+// complete.
+// Note: Its corresponding module map entry is typically not yet created at the
+// time of callback.
+class ModuleScriptLoaderClient : public GarbageCollectedMixin {
+ public:
+  virtual ~ModuleScriptLoaderClient(){};
+
+ private:
+  friend class ModuleScriptLoader;
+  virtual void notifyFinishedNewSingleModule(ModuleScript*) = 0;
+};
+
+}  // namespace blink
+
+#endif