Introduce AnimationWorkletProxyClient and necessary plumbing to get it in worklet messaging proxy.

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 1086 matching lines @@
 void ChromeClientImpl::registerViewportLayers() const {
   if (m_webView->rootGraphicsLayer() && m_webView->layerTreeView())
     m_webView->registerViewportLayersWithCompositor();
 }
 
 void ChromeClientImpl::didUpdateBrowserControls() const {
   m_webView->didUpdateBrowserControls();
 }
 
 CompositorProxyClient* ChromeClientImpl::createCompositorProxyClient(
+    CompositorProxyClient::Type type,
     LocalFrame* frame) {
   WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(frame);
-  return webFrame->localRoot()->frameWidget()->createCompositorProxyClient();
+  return webFrame->localRoot()->frameWidget()->createCompositorProxyClient(
+      type);
 }
 
 void ChromeClientImpl::registerPopupOpeningObserver(
     PopupOpeningObserver* observer) {
   DCHECK(observer);
   m_popupOpeningObservers.push_back(observer);
 }
 
 void ChromeClientImpl::unregisterPopupOpeningObserver(
     PopupOpeningObserver* observer) {
@@ skipping 46 matching lines @@
     PresentationController::provideTo(frame, client->presentationClient());
   if (RuntimeEnabledFeatures::audioOutputDevicesEnabled()) {
     provideAudioOutputDeviceClientTo(frame,
                                      new AudioOutputDeviceClientImpl(frame));
   }
   if (RuntimeEnabledFeatures::installedAppEnabled())
     InstalledAppController::provideTo(frame, client->installedAppClient());
 }
 
 }  // namespace blink