Abstract out Modulator from V8PerContextData

third_party/WebKit/Source/core/dom/Modulator.h

Index: third_party/WebKit/Source/core/dom/Modulator.h
diff --git a/third_party/WebKit/Source/core/dom/Modulator.h b/third_party/WebKit/Source/core/dom/Modulator.h
index 22517c73622907a69f17327d9a7ead0d4a4545aa..bae8f36969073c26fc3cdc22ab11856970195c73 100644
--- a/third_party/WebKit/Source/core/dom/Modulator.h
+++ b/third_party/WebKit/Source/core/dom/Modulator.h
@@ -5,6 +5,7 @@
 #ifndef Modulator_h
 #define Modulator_h
 
+#include "bindings/core/v8/V8PerContextData.h"
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
@@ -39,11 +40,18 @@ enum class ModuleGraphLevel { TopLevelModuleFetch, DependentModuleFetch };
 // https://html.spec.whatwg.org/#environment-settings-object
 //
 // A Modulator also serves as an entry point for various module spec algorithms.
-class CORE_EXPORT Modulator : public GarbageCollectedFinalized<Modulator> {
+class CORE_EXPORT Modulator : public GarbageCollectedFinalized<Modulator>,
+                              public V8PerContextData::Data {
+  USING_GARBAGE_COLLECTED_MIXIN(Modulator);
+
  public:
   static Modulator* from(LocalFrame*);
+  static Modulator* from(V8PerContextData*);
   virtual ~Modulator();
 
+  static void setModulator(LocalFrame*, Modulator*);
+  static void clearModulator(LocalFrame*);
+
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 
   virtual ScriptModuleResolver* scriptModuleResolver() = 0;