ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h

Index: third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
diff --git a/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h b/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
index 856ed7dadce1469f16a2ccd0992da1add61350ef..58f18ee304c4d8524780ffd958297222f4bfcf90 100644
--- a/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
+++ b/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
@@ -8,6 +8,7 @@
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/TraceWrapperMember.h"
+#include "core/dom/ExecutionContext.h"
 #include "core/events/EventTarget.h"
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
@@ -20,7 +21,6 @@
 
 namespace blink {
 
-class ExecutionContext;
 class HTMLMediaElement;
 class RemotePlaybackAvailabilityCallback;
 class ScriptPromiseResolver;
@@ -28,7 +28,7 @@ class ScriptState;
 
 class MODULES_EXPORT RemotePlayback final
     : public EventTargetWithInlineData,
-      public ActiveScriptWrappable,
+      public ActiveScriptWrappable<RemotePlayback>,
       NON_EXPORTED_BASE(public WebRemotePlaybackClient) {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(RemotePlayback);