Revert of Reduce ActiveDOMObjects from modules/mediastream/

third_party/WebKit/Source/modules/mediastream/RTCStatsRequestImpl.h

Index: third_party/WebKit/Source/modules/mediastream/RTCStatsRequestImpl.h
diff --git a/third_party/WebKit/Source/modules/mediastream/RTCStatsRequestImpl.h b/third_party/WebKit/Source/modules/mediastream/RTCStatsRequestImpl.h
index 0dced6e8d2fcdefc80b9f5e1a95b5b58e5d3971a..96007f74e15ca25dc20879d9139d9f0072330a54 100644
--- a/third_party/WebKit/Source/modules/mediastream/RTCStatsRequestImpl.h
+++ b/third_party/WebKit/Source/modules/mediastream/RTCStatsRequestImpl.h
@@ -25,7 +25,7 @@
 #ifndef RTCStatsRequestImpl_h
 #define RTCStatsRequestImpl_h
 
-#include "core/dom/ContextLifecycleObserver.h"
+#include "core/dom/ActiveDOMObject.h"
 #include "modules/mediastream/RTCStatsResponse.h"
 #include "platform/heap/Handle.h"
 #include "platform/mediastream/RTCStatsRequest.h"
@@ -38,7 +38,7 @@
 class RTCPeerConnection;
 class RTCStatsCallback;
 
-class RTCStatsRequestImpl final : public RTCStatsRequest, public ContextLifecycleObserver {
+class RTCStatsRequestImpl final : public RTCStatsRequest, public ActiveDOMObject {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(RTCStatsRequestImpl);
 public:
     static RTCStatsRequestImpl* create(ExecutionContext*, RTCPeerConnection*, RTCStatsCallback*, MediaStreamTrack*);
@@ -50,7 +50,8 @@
 
     void requestSucceeded(RTCStatsResponseBase*) override;
 
-    void contextDestroyed() override;
+    // ActiveDOMObject
+    void stop() override;
 
     DECLARE_VIRTUAL_TRACE();