[ES6 modules] Implement #concept-module-script-instantiation-error

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

Index: third_party/WebKit/Source/core/dom/ModuleScript.cpp
diff --git a/third_party/WebKit/Source/core/dom/ModuleScript.cpp b/third_party/WebKit/Source/core/dom/ModuleScript.cpp
index 0ab530f2e7bf380eb06370d210bd3475a855d34e..2f9e74d601011094dc6b9ff8faaf5b50b0321c69 100644
--- a/third_party/WebKit/Source/core/dom/ModuleScript.cpp
+++ b/third_party/WebKit/Source/core/dom/ModuleScript.cpp
@@ -6,6 +6,23 @@
 
 namespace blink {
 
+void ModuleScript::setInstantiationError(v8::Isolate* isolate,
+                                         v8::Local<v8::Value> error) {
+  DCHECK_EQ(m_instantiationState, ModuleInstantiationState::Uninstantiated);
+  m_instantiationState = ModuleInstantiationState::Errored;
+
+  DCHECK(!error.IsEmpty());
+  m_instantiationError.set(isolate, error);
+}
+
+void ModuleScript::setInstantiationSuccess() {
+  DCHECK_EQ(m_instantiationState, ModuleInstantiationState::Uninstantiated);
+  m_instantiationState = ModuleInstantiationState::Instantiated;
+}
+
 DEFINE_TRACE(ModuleScript) {}
+DEFINE_TRACE_WRAPPERS(ModuleScript) {
+  visitor->traceWrappers(m_instantiationError);
+}
 
 }  // namespace blink