[ES6 modules] Introduce Modulator "module map settings object"

third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp b/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
index 8b8b7f8c213bc48b14f61c07630e46f8d9b0dd02..2f2ff3968943803d2f9cb5135b898f2ffe3d21b5 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
@@ -34,6 +34,7 @@
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8ObjectConstructor.h"
+#include "core/dom/Modulator.h"
 #include "platform/InstanceCounters.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/StringExtras.h"
@@ -48,7 +49,7 @@ V8PerContextData::V8PerContextData(v8::Local<v8::Context> context)
       m_constructorMap(m_isolate),
       m_contextHolder(WTF::makeUnique<gin::ContextHolder>(m_isolate)),
       m_context(m_isolate, context),
-      m_activityLogger(0) {
+      m_activityLogger(nullptr) {
   m_contextHolder->SetContext(context);
 
   v8::Context::Scope contextScope(context);
@@ -174,4 +175,14 @@ void V8PerContextData::addCustomElementBinding(
   m_customElementBindings.push_back(std::move(binding));
 }
 
+void V8PerContextData::setModulator(Modulator* modulator) {
+  DCHECK(!m_modulator);
+  DCHECK(modulator);
+  m_modulator = modulator;
+}
+
+void V8PerContextData::clearModulator() {
+  m_modulator = nullptr;
+}
+
 }  // namespace blink