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

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 37 matching lines @@
 #include "public/platform/WebPoint.h"
 #include "public/platform/WebRect.h"
 #include "public/platform/WebScheduler.h"
 #include "public/platform/WebSize.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebVector.h"
 #include "public/web/WebNavigationPolicy.h"
 #include "public/web/WebPageImportanceSignals.h"
 #include "public/web/WebView.h"
 #include "web/ChromeClientImpl.h"
+#include "web/CompositorProxyClientFactoryImpl.h"
 #include "web/ContextMenuClientImpl.h"
 #include "web/EditorClientImpl.h"
 #include "web/MediaKeysClientImpl.h"
 #include "web/PageWidgetDelegate.h"
 #include "web/ResizeViewportAnchor.h"
 #include "web/SpellCheckerClientImpl.h"
 #include "web/StorageClientImpl.h"
 #include "web/WebExport.h"
 #include "wtf/Compiler.h"
 #include "wtf/HashSet.h"
@@ skipping 411 matching lines @@
                                   bool animate) override;
 
   BrowserControls& browserControls();
   // Called anytime browser controls layout height or content offset have
   // changed.
   void didUpdateBrowserControls();
 
   void forceNextWebGLContextCreationToFail() override;
   void forceNextDrawingBufferCreationToFail() override;
 
-  CompositorProxyClient* createCompositorProxyClient();
+  CompositorProxyClientFactory* compositorProxyClientFactory();
   IntSize mainFrameSize();
   WebDisplayMode displayMode() const { return m_displayMode; }
 
   PageScaleConstraintsSet& pageScaleConstraintsSet() const;
 
   FloatSize elasticOverscroll() const { return m_elasticOverscroll; }
 
   bool isTransparent() const;
   void setIsTransparent(bool value);
 
@@ skipping 209 matching lines @@
   bool m_shouldDispatchFirstLayoutAfterFinishedParsing;
   bool m_shouldDispatchFirstLayoutAfterFinishedLoading;
   WebDisplayMode m_displayMode;
 
   FloatSize m_elasticOverscroll;
 
   // This is owned by the LayerTreeHostImpl, and should only be used on the
   // compositor thread. The LayerTreeHostImpl is indirectly owned by this
   // class so this pointer should be valid until this class is destructed.
   CrossThreadPersistent<CompositorMutatorImpl> m_mutator;
+  Persistent<CompositorProxyClientFactoryImpl> m_proxyClientFactory;
 
   Persistent<EventListener> m_popupMouseWheelEventListener;
 
   WebPageImportanceSignals m_pageImportanceSignals;
 
   const std::unique_ptr<WebViewScheduler> m_scheduler;
 
   double m_lastFrameTimeMonotonic;
 
   // TODO(lfg): This is used in order to disable compositor visibility while
   // the page is still visible. This is needed until the WebView and WebWidget
   // split is complete, since in out-of-process iframes the page can be
   // visible, but the WebView should not be used as a widget.
   bool m_overrideCompositorVisibility;
 
   Persistent<ResizeViewportAnchor> m_resizeViewportAnchor;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 }  // namespace blink
 
 #endif