[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.h

Index: third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.h
diff --git a/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.h b/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.h
index ce1e3167b1125091996008d148c70878bdf1bd25..f4b2c8688f9edcf8a7af95b5a99c855101684dac 100644
--- a/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.h
+++ b/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.h
@@ -5,6 +5,7 @@
 #ifndef MediaRecorder_h
 #define MediaRecorder_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventTarget.h"
 #include "modules/EventTargetModules.h"
@@ -24,6 +25,7 @@ class ExceptionState;
 class MODULES_EXPORT MediaRecorder final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<MediaRecorder>
     , public WebMediaRecorderHandlerClient
+    , public ActiveScriptWrappable
     , public ActiveDOMObject {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MediaRecorder);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaRecorder);
@@ -72,7 +74,9 @@ public:
     void suspend() override;
     void resume() override;
     void stop() override;
-    bool hasPendingActivity() const override { return !m_stopped; }
+
+    // ActiveScriptWrappable
+    bool hasPendingActivity() const final { return !m_stopped; }
 
     // WebMediaRecorderHandlerClient
     void writeData(const char* data, size_t length, bool lastInSlice) override;