NavigatorContentUtils should be a supplement of Navigator

third_party/WebKit/Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 39 matching lines @@
 #include "core/layout/LayoutPart.h"
 #include "core/layout/compositing/CompositedSelection.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/page/Page.h"
 #include "core/page/PopupOpeningObserver.h"
 #include "modules/accessibility/AXObject.h"
 #include "modules/audio_output_devices/AudioOutputDeviceClient.h"
 #include "modules/installedapp/InstalledAppController.h"
 #include "modules/mediastream/UserMediaController.h"
+#include "modules/navigatorcontentutils/NavigatorContentUtils.h"
 #include "modules/presentation/PresentationController.h"
 #include "modules/push_messaging/PushController.h"
 #include "modules/screen_orientation/ScreenOrientationControllerImpl.h"
 #include "modules/vr/VRController.h"
 #include "platform/Cursor.h"
 #include "platform/FileChooser.h"
 #include "platform/Histogram.h"
 #include "platform/KeyboardCodes.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/WebFrameScheduler.h"
@@ skipping 1078 matching lines @@
 
 void ChromeClientImpl::installSupplements(LocalFrame& frame) {
   WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(&frame);
   WebFrameClient* client = webFrame->client();
   DCHECK(client);
   providePushControllerTo(frame, client->pushClient());
   provideUserMediaTo(frame,
                      UserMediaClientImpl::create(client->userMediaClient()));
   provideIndexedDBClientTo(frame, IndexedDBClientImpl::create(frame));
   provideLocalFileSystemTo(frame, LocalFileSystemClient::create());
-  provideNavigatorContentUtilsTo(
-      frame, NavigatorContentUtilsClientImpl::create(webFrame));
+  NavigatorContentUtils::provideNavigatorContentUtilsTo(
+      *frame.domWindow()->navigator(),

[sof, 2017/01/13 07:40:30]

this will now instantiate a Navigator earlier (and always), but i suppose it
isn't too heavy.

+      NavigatorContentUtilsClientImpl::create(webFrame));
 
   ScreenOrientationControllerImpl::provideTo(
       frame, client->webScreenOrientationClient());
   if (RuntimeEnabledFeatures::presentationEnabled())
     PresentationController::provideTo(frame, client->presentationClient());
   if (RuntimeEnabledFeatures::audioOutputDevicesEnabled()) {
     provideAudioOutputDeviceClientTo(frame,
                                      new AudioOutputDeviceClientImpl(frame));
   }
   if (RuntimeEnabledFeatures::installedAppEnabled())
     InstalledAppController::provideTo(frame, client->installedAppClient());
 }
 
 }  // namespace blink