diff --git a/atom/browser/atom_permission_manager.cc b/atom/browser/atom_permission_manager.cc
index e6269a411ad3..218404434142 100644
--- a/atom/browser/atom_permission_manager.cc
+++ b/atom/browser/atom_permission_manager.cc
@@ -186,15 +186,6 @@ void AtomPermissionManager::OnPermissionResponse(
   }
 }
 
-void AtomPermissionManager::CancelPermissionRequest(int request_id) {
-  auto* pending_request = pending_requests_.Lookup(request_id);
-  if (!pending_request)
-    return;
-
-  if (!WebContentsDestroyed(pending_request->render_process_id()))
-    pending_request->RunCallback();
-  pending_requests_.Remove(request_id);
-}
 
 void AtomPermissionManager::ResetPermission(content::PermissionType permission,
                                             const GURL& requesting_origin,
diff --git a/atom/browser/atom_permission_manager.h b/atom/browser/atom_permission_manager.h
index 1b955f2351f8..de2383733053 100644
--- a/atom/browser/atom_permission_manager.h
+++ b/atom/browser/atom_permission_manager.h
@@ -73,7 +73,6 @@ class AtomPermissionManager : public content::PermissionManager {
                             blink::mojom::PermissionStatus status);
 
   // content::PermissionManager:
-  void CancelPermissionRequest(int request_id) override;
   void ResetPermission(content::PermissionType permission,
                        const GURL& requesting_origin,
                        const GURL& embedding_origin) override;