Remove references to blink::WebPageOverlay.

third_party/WebKit/Source/web/PageOverlay.h

 /*
  * Copyright (C) 2011 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 21 matching lines @@
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/GraphicsLayerClient.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
 #include "web/WebExport.h"
 #include "wtf/text/WTFString.h"
 #include <memory>
 
 namespace blink {
 
 class GraphicsContext;
-class WebPageOverlay;
 class WebViewImpl;
 
 // Manages a layer that is overlaid on a WebView's content.
-// Clients can paint by implementing WebPageOverlay.
-//
-// With Slimming Paint, internal clients can extract a GraphicsContext to add
-// to the PaintController owned by the GraphicsLayer
 class WEB_EXPORT PageOverlay : public GraphicsLayerClient, public DisplayItemClient {
 public:
     class Delegate : public GarbageCollectedFinalized<Delegate> {
     public:
         DEFINE_INLINE_VIRTUAL_TRACE() { }
 
         // Paints page overlay contents.
         virtual void paintPageOverlay(const PageOverlay&, GraphicsContext&, const WebSize& webViewSize) const = 0;
         virtual ~Delegate() { }
     };
@@ skipping 20 matching lines @@
     PageOverlay(WebViewImpl*, PageOverlay::Delegate*);
 
     WebViewImpl* m_viewImpl;
     Persistent<PageOverlay::Delegate> m_delegate;
     std::unique_ptr<GraphicsLayer> m_layer;
 };
 
 } // namespace blink
 
 #endif // PageOverlay_h