Clear PermissionStatus::m_service in pre-finalizer

third_party/WebKit/Source/modules/permissions/PermissionStatus.cpp

Index: third_party/WebKit/Source/modules/permissions/PermissionStatus.cpp
diff --git a/third_party/WebKit/Source/modules/permissions/PermissionStatus.cpp b/third_party/WebKit/Source/modules/permissions/PermissionStatus.cpp
index 71f9f8e0665966310008d755f143329ef3779c67..265cfcb54ccede3cdb9deb94ad54d380aff5fdc9 100644
--- a/third_party/WebKit/Source/modules/permissions/PermissionStatus.cpp
+++ b/third_party/WebKit/Source/modules/permissions/PermissionStatus.cpp
@@ -39,9 +39,11 @@ PermissionStatus::PermissionStatus(ExecutionContext* executionContext,
     : ActiveScriptWrappable(this),
       ActiveDOMObject(executionContext),
       m_status(status),
-      m_descriptor(std::move(descriptor)) {}
+      m_descriptor(std::move(descriptor)) {
+  ThreadState::current()->registerPreFinalizer(this);
+}
 
-PermissionStatus::~PermissionStatus() {
+void PermissionStatus::dispose() {
   stopListening();
 }