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

third_party/WebKit/Source/core/dom/ModuleScript.cpp

 // 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.
 
 #include "core/dom/ModuleScript.h"
 
+#include "bindings/core/v8/V8Binding.h"
+#include "bindings/core/v8/V8ThrowException.h"
+#include "core/dom/Modulator.h"
+#include "core/dom/ScriptModuleResolver.h"
+
 namespace blink {
 
-void ModuleScript::SetInstantiationError(v8::Isolate* isolate,
-                                         v8::Local<v8::Value> error) {
+void ModuleScript::SetInstantiationErrorAndClearRecord(ScriptValue error) {
   DCHECK_EQ(instantiation_state_, ModuleInstantiationState::kUninstantiated);
   instantiation_state_ = ModuleInstantiationState::kErrored;
 
   DCHECK(!error.IsEmpty());
-  instantiation_error_.Set(isolate, error);
+  {
+    ScriptState::Scope scope(error.GetScriptState());
+    instantiation_error_.Set(error.GetIsolate(), error.V8Value());
+  }
+
+  record_ = ScriptModule();
 }
 
 void ModuleScript::SetInstantiationSuccess() {
   DCHECK_EQ(instantiation_state_, ModuleInstantiationState::kUninstantiated);
   instantiation_state_ = ModuleInstantiationState::kInstantiated;
 }
 
 DEFINE_TRACE(ModuleScript) {
   visitor->Trace(settings_object_);
   Script::Trace(visitor);
 }
 DEFINE_TRACE_WRAPPERS(ModuleScript) {
   visitor->TraceWrappers(instantiation_error_);
 }
 
 bool ModuleScript::IsEmpty() const {
   return false;
 }
 
 bool ModuleScript::CheckMIMETypeBeforeRunScript(Document* context_document,
                                                 const SecurityOrigin*) const {
   // We don't check MIME type here because we check the MIME type in
   // ModuleScriptLoader::WasModuleLoadSuccessful().
   return true;
 }
 
 void ModuleScript::RunScript(LocalFrame* frame, const SecurityOrigin*) const {
-  // TODO(hiroshige): Implement this once Modulator::ExecuteModule() is landed.
-  NOTREACHED();
+  fprintf(stderr, "ModuleScript: isNull=%d state=%d\n", record_.IsNull(),
+          InstantiationState());
+
+  settings_object_->ExecuteModule(this);
 }
 
 String ModuleScript::InlineSourceTextForCSP() const {
   // Currently we don't support inline module scripts.
   // TODO(hiroshige): Implement this.
   NOTREACHED();
   return String();
 }
 
 }  // namespace blink