[Module] Add layout tests

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/ScriptState.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "v8/include/v8.h"
+#include "bindings/core/v8/V8BindingForCore.h"
 
 namespace blink {
 
 void ModuleScript::SetInstantiationErrorAndClearRecord(ScriptValue error) {
   // Implements Step 7.1 of:
   // https://html.spec.whatwg.org/multipage/webappapis.html#internal-module-script-graph-fetching-procedure
 
   // "set script's instantiation state to "errored", ..."
   DCHECK_EQ(instantiation_state_, ModuleInstantiationState::kUninstantiated);
   instantiation_state_ = ModuleInstantiationState::kErrored;
 
   // "its instantiation error to instantiationStatus.[[Value]], and ..."
   DCHECK(!error.IsEmpty());
   {
     ScriptState::Scope scope(error.GetScriptState());
+    // String str = ToCoreString(
+    //     error.V8Value()->ToString(error.GetContext()).ToLocalChecked());
+    // fprintf(stderr, "[%s]\n", str.Utf8().Data());
     instantiation_error_.Set(error.GetIsolate(), error.V8Value());
   }
 
   // "its module record to null."
   record_ = ScriptModule();
 }
 
 void ModuleScript::SetInstantiationSuccess() {
   // Implements Step 7.2 of:
   // https://html.spec.whatwg.org/multipage/webappapis.html#internal-module-script-graph-fetching-procedure
@@ skipping 27 matching lines @@
 }
 
 String ModuleScript::InlineSourceTextForCSP() const {
   // Currently we don't support inline module scripts.
   // TODO(hiroshige): Implement this.
   NOTREACHED();
   return String();
 }
 
 }  // namespace blink