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

third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.h

Index: third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.h
diff --git a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.h b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.h
index 32518c964d01bfebfebdfb1bc8c0db19c39cabfc..dfaf9d4aacca3b59659b57fb6fcf739e6588bd24 100644
--- a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.h
+++ b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.h
@@ -22,6 +22,7 @@
 #ifndef XMLHttpRequest_h
 #define XMLHttpRequest_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptString.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ActiveDOMObject.h"
@@ -66,7 +67,7 @@ class XMLHttpRequestUpload;
 
 typedef int ExceptionCode;
 
-class XMLHttpRequest final : public XMLHttpRequestEventTarget, private ThreadableLoaderClient, public DocumentParserClient, public ActiveDOMObject {
+class XMLHttpRequest final : public XMLHttpRequestEventTarget, private ThreadableLoaderClient, public DocumentParserClient, public ActiveScriptWrappable, public ActiveDOMObject {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(XMLHttpRequest);
 public:
@@ -96,11 +97,13 @@ public:
     // ActiveDOMObject
     void contextDestroyed() override;
     ExecutionContext* getExecutionContext() const override;
-    bool hasPendingActivity() const override;
     void suspend() override;
     void resume() override;
     void stop() override;
 
+    // ActiveScriptWrappable
+    bool hasPendingActivity() const final;
+
     // XMLHttpRequestEventTarget
     const AtomicString& interfaceName() const override;