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

third_party/WebKit/Source/modules/battery/BatteryManager.h

Index: third_party/WebKit/Source/modules/battery/BatteryManager.h
diff --git a/third_party/WebKit/Source/modules/battery/BatteryManager.h b/third_party/WebKit/Source/modules/battery/BatteryManager.h
index 52f2657abcbf6297580342e1f1ee5db93405d193..cf239e3ef6d9c391cdd6c08d6c402d4d4c0b60f3 100644
--- a/third_party/WebKit/Source/modules/battery/BatteryManager.h
+++ b/third_party/WebKit/Source/modules/battery/BatteryManager.h
@@ -5,6 +5,7 @@
 #ifndef BatteryManager_h
 #define BatteryManager_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseProperty.h"
 #include "core/dom/ActiveDOMObject.h"
@@ -16,7 +17,7 @@
 
 namespace blink {
 
-class BatteryManager final : public RefCountedGarbageCollectedEventTargetWithInlineData<BatteryManager>, public ActiveDOMObject, public PlatformEventController {
+class BatteryManager final : public RefCountedGarbageCollectedEventTargetWithInlineData<BatteryManager>, public ActiveScriptWrappable, public ActiveDOMObject, public PlatformEventController {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(BatteryManager);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BatteryManager);
@@ -51,7 +52,9 @@ public:
     void suspend() override;
     void resume() override;
     void stop() override;
-    bool hasPendingActivity() const override;
+
+    // ActiveScriptWrappable implementation.
+    bool hasPendingActivity() const final;
 
     DECLARE_VIRTUAL_TRACE();