Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/background_sync/SyncCallbacks.h

Index: Source/modules/background_sync/SyncCallbacks.h
diff --git a/Source/modules/background_sync/SyncCallbacks.h b/Source/modules/background_sync/SyncCallbacks.h
index fbc7d9f77c486e691d4ca568a4e93a3845a0dffc..6e42a64fd45c3fb180c93f0f671789278e0a6b7a 100644
--- a/Source/modules/background_sync/SyncCallbacks.h
+++ b/Source/modules/background_sync/SyncCallbacks.h
@@ -28,14 +28,14 @@ class WebString;
 class SyncRegistrationCallbacks final : public WebSyncRegistrationCallbacks {
     WTF_MAKE_NONCOPYABLE(SyncRegistrationCallbacks);
 public:
-    SyncRegistrationCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver>, ServiceWorkerRegistration*);
+    SyncRegistrationCallbacks(ScriptPromiseResolver*, ServiceWorkerRegistration*);
     ~SyncRegistrationCallbacks() override;
 
     void onSuccess(WebSyncRegistration*) override;
     void onError(WebSyncError*) override;
 
 private:
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
+    Persistent<ScriptPromiseResolver> m_resolver;
     Persistent<ServiceWorkerRegistration> m_serviceWorkerRegistration;
 };
 
@@ -47,14 +47,14 @@ private:
 class SyncUnregistrationCallbacks final : public WebSyncUnregistrationCallbacks {
     WTF_MAKE_NONCOPYABLE(SyncUnregistrationCallbacks);
 public:
-    SyncUnregistrationCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver>, ServiceWorkerRegistration*);
+    SyncUnregistrationCallbacks(ScriptPromiseResolver*, ServiceWorkerRegistration*);
     ~SyncUnregistrationCallbacks() override;
 
     void onSuccess(bool*) override;
     void onError(WebSyncError*) override;
 
 private:
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
+    Persistent<ScriptPromiseResolver> m_resolver;
     Persistent<ServiceWorkerRegistration> m_serviceWorkerRegistration;
 };
 
@@ -65,14 +65,14 @@ private:
 class SyncGetRegistrationsCallbacks final : public WebSyncGetRegistrationsCallbacks {
     WTF_MAKE_NONCOPYABLE(SyncGetRegistrationsCallbacks);
 public:
-    SyncGetRegistrationsCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver>, ServiceWorkerRegistration*);
+    SyncGetRegistrationsCallbacks(ScriptPromiseResolver*, ServiceWorkerRegistration*);
     ~SyncGetRegistrationsCallbacks() override;
 
     void onSuccess(WebVector<WebSyncRegistration*>*) override;
     void onError(WebSyncError*) override;
 
 private:
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
+    Persistent<ScriptPromiseResolver> m_resolver;
     Persistent<ServiceWorkerRegistration> m_serviceWorkerRegistration;
 };
 
@@ -82,7 +82,7 @@ private:
 class SyncGetPermissionStatusCallbacks final : public WebSyncGetPermissionStatusCallbacks {
     WTF_MAKE_NONCOPYABLE(SyncGetPermissionStatusCallbacks);
 public:
-    SyncGetPermissionStatusCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver>, ServiceWorkerRegistration*);
+    SyncGetPermissionStatusCallbacks(ScriptPromiseResolver*, ServiceWorkerRegistration*);
     ~SyncGetPermissionStatusCallbacks() override;
 
     void onSuccess(WebSyncPermissionStatus*) override;
@@ -90,7 +90,8 @@ public:
 
 private:
     static String permissionString(WebSyncPermissionStatus);
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
+
+    Persistent<ScriptPromiseResolver> m_resolver;
     Persistent<ServiceWorkerRegistration> m_serviceWorkerRegistration;
 };