Remove PageVisibilityObserver contextDestroyed() notifications.

third_party/WebKit/Source/modules/geolocation/Geolocation.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009 Torch Mobile, Inc.
  * Copyright 2010, The Android Open Source Project
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 105 matching lines @@
 
 void Geolocation::contextDestroyed(ExecutionContext*) {
   m_permissionService.reset();
   cancelAllRequests();
   stopUpdating();
   m_geolocationPermission = PermissionDenied;
   m_pendingForPermissionNotifiers.clear();
   m_lastPosition = nullptr;
 }
 
-void Geolocation::contextDestroyed(Page*) {}
-
 void Geolocation::recordOriginTypeAccess() const {
   DCHECK(frame());
 
   Document* document = this->document();
   DCHECK(document);
 
   // It is required by isSecureContext() but isn't
   // actually used. This could be used later if a warning is shown in the
   // developer console.
   String insecureOriginMsg;
@@ skipping 410 matching lines @@
   // be called. In that case, blink has already shut down so do nothing.
   //
   // TODO(sammc): Remove this once renderer shutdown is no longer graceful.
   if (!Platform::current())
     return;
 
   onGeolocationPermissionUpdated(mojom::blink::PermissionStatus::DENIED);
 }
 
 }  // namespace blink