Move PageOverlay::Delegate off the Oilpan heap.

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 26 matching lines @@
 #include <memory>
 
 namespace blink {
 
 class GraphicsContext;
 class WebViewImpl;
 
 // Manages a layer that is overlaid on a WebView's content.
 class WEB_EXPORT PageOverlay : public GraphicsLayerClient, public DisplayItemClient {
 public:
-    class Delegate : public GarbageCollectedFinalized<Delegate> {
+    class Delegate {
     public:
-        DEFINE_INLINE_VIRTUAL_TRACE() { }
+        virtual ~Delegate() { }
 
         // Paints page overlay contents.
         virtual void paintPageOverlay(const PageOverlay&, GraphicsContext&, const WebSize& webViewSize) const = 0;
-        virtual ~Delegate() { }
     };
 
-    static std::unique_ptr<PageOverlay> create(WebViewImpl*, PageOverlay::Delegate*);
+    static std::unique_ptr<PageOverlay> create(WebViewImpl*, std::unique_ptr<PageOverlay::Delegate>);
 
     ~PageOverlay();
 
     void update();
 
     GraphicsLayer* graphicsLayer() const { return m_layer.get(); }
 
     // DisplayItemClient methods.
     String debugName() const final { return "PageOverlay"; }
     LayoutRect visualRect() const override;
 
     // GraphicsLayerClient implementation
     bool needsRepaint(const GraphicsLayer&) const { return true; }
     IntRect computeInterestRect(const GraphicsLayer*, const IntRect&) const override;
     void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& interestRect) const override;
     String debugName(const GraphicsLayer*) const override;
 
 private:
-    PageOverlay(WebViewImpl*, PageOverlay::Delegate*);
+    PageOverlay(WebViewImpl*, std::unique_ptr<PageOverlay::Delegate>);
 
     WebViewImpl* m_viewImpl;
-    Persistent<PageOverlay::Delegate> m_delegate;
+    std::unique_ptr<PageOverlay::Delegate> m_delegate;
     std::unique_ptr<GraphicsLayer> m_layer;
 };
 
 } // namespace blink
 
 #endif // PageOverlay_h