[ES6 modules] Fix context leak. ModuleScript should use TraceWrapperV8Reference to hold onto v8::Mo…

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

 // 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.
 
 #ifndef Modulator_h
 #define Modulator_h
 
 #include "core/CoreExport.h"
 #include "core/dom/AncestorList.h"
 #include "platform/bindings/ScriptWrappable.h"
@@ skipping 52 matching lines @@
 
   static void SetModulator(ScriptState*, Modulator*);
   static void ClearModulator(ScriptState*);
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 
   virtual ScriptModuleResolver* GetScriptModuleResolver() = 0;
   virtual WebTaskRunner* TaskRunner() = 0;
   virtual ReferrerPolicy GetReferrerPolicy() = 0;
   virtual SecurityOrigin* GetSecurityOrigin() = 0;
+  virtual ScriptState* GetScriptState() = 0;
 
   // https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-module-script-tree
   virtual void FetchTree(const ModuleScriptFetchRequest&,
                          ModuleTreeClient*) = 0;
 
   // https://html.spec.whatwg.org/#internal-module-script-graph-fetching-procedure
   virtual void FetchTreeInternal(const ModuleScriptFetchRequest&,
                                  const AncestorList&,
                                  ModuleGraphLevel,
                                  ModuleTreeClient*) = 0;
@@ skipping 40 matching lines @@
   // if the cached entry doesn't exist.
   // The client can be notified either synchronously or asynchronously.
   virtual void FetchNewSingleModule(const ModuleScriptFetchRequest&,
                                     ModuleGraphLevel,
                                     ModuleScriptLoaderClient*) = 0;
 };
 
 }  // namespace blink
 
 #endif