Replace DOMWindowProperty in Navigator supplements with ContextClient

third_party/WebKit/Source/modules/beacon/NavigatorBeacon.h

Index: third_party/WebKit/Source/modules/beacon/NavigatorBeacon.h
diff --git a/third_party/WebKit/Source/modules/beacon/NavigatorBeacon.h b/third_party/WebKit/Source/modules/beacon/NavigatorBeacon.h
index abcd58edc01f0bff432aa7e8e3d3ae35496f25ab..52b2f9c16dcf285206061a249ca4b9cdce334da4 100644
--- a/third_party/WebKit/Source/modules/beacon/NavigatorBeacon.h
+++ b/third_party/WebKit/Source/modules/beacon/NavigatorBeacon.h
@@ -5,7 +5,7 @@
 #ifndef NavigatorBeacon_h
 #define NavigatorBeacon_h
 
-#include "core/frame/DOMWindowProperty.h"
+#include "core/dom/ContextLifecycleObserver.h"
 #include "core/frame/Navigator.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
@@ -18,7 +18,7 @@ class KURL;
 class ArrayBufferViewOrBlobOrStringOrFormData;
 
 class NavigatorBeacon final : public GarbageCollectedFinalized<NavigatorBeacon>,
-                              public DOMWindowProperty,
+                              public ContextClient,
                               public Supplement<Navigator> {
   USING_GARBAGE_COLLECTED_MIXIN(NavigatorBeacon);