[ES6 modules] Make Modulator regular GCollected / not mixin

third_party/WebKit/Source/core/testing/DummyModulator.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 DummyModulator_h
 #define DummyModulator_h
 
 #include "bindings/core/v8/ScriptModule.h"
 #include "core/dom/Modulator.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class ModuleScriptLoaderClient;
 class ScriptModuleResolver;
 class WebTaskRunner;
 class ModuleScriptFetchRequest;
 
 // DummyModulator provides empty Modulator interface implementation w/
 // NOTREACHED().
 //
 // DummyModulator is useful for unit-testing.
 // Not all module implementation components require full-blown Modulator
 // implementation. Unit tests can implement a subset of Modulator interface
 // which is exercised from unit-under-test.
-class DummyModulator : public GarbageCollectedFinalized<DummyModulator>,
-                       public Modulator {
-  USING_GARBAGE_COLLECTED_MIXIN(DummyModulator);
+class DummyModulator : public Modulator {
   DISALLOW_COPY_AND_ASSIGN(DummyModulator);
 
  public:
   DummyModulator();
   virtual ~DummyModulator();
   DECLARE_TRACE();
 
   ScriptModuleResolver* scriptModuleResolver() override;
   WebTaskRunner* taskRunner() override;
   ReferrerPolicy referrerPolicy() override;
   SecurityOrigin* securityOrigin() override;
 
   void fetchNewSingleModule(const ModuleScriptFetchRequest&,
                             ModuleGraphLevel,
                             ModuleScriptLoaderClient*) override;
   ScriptModule compileModule(const String& script,
                              const String& urlStr) override;
 };
 
 }  // namespace blink
 
 #endif  // DummyModulator_h