Use compositor for page popups.

Source/web/WebPagePopupImpl.h

 /*
  * Copyright (C) 2012 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 20 matching lines @@
 #ifndef WebPagePopupImpl_h
 #define WebPagePopupImpl_h
 
 #include "PageWidgetDelegate.h"
 #include "WebPagePopup.h"
 #include "core/page/PagePopup.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
+class GraphicsLayer;
 class Page;
 class PagePopupClient;
 class PlatformKeyboardEvent;
 }
 
 namespace blink {
 
 class PagePopupChromeClient;
+class WebLayerTreeView;
+class WebLayer;
 class WebViewImpl;
 
 class WebPagePopupImpl FINAL :
     public WebPagePopup,
     public PageWidgetEventHandler,
     public WebCore::PagePopup,
     public RefCounted<WebPagePopupImpl> {
     WTF_MAKE_NONCOPYABLE(WebPagePopupImpl);
     WTF_MAKE_FAST_ALLOCATED;
 
 public:
     virtual ~WebPagePopupImpl();
     bool initialize(WebViewImpl*, WebCore::PagePopupClient*, const WebCore::IntRect& originBoundsInRootView);
     bool handleKeyEvent(const WebCore::PlatformKeyboardEvent&);
     void closePopup();
     WebWidgetClient* widgetClient() const { return m_widgetClient; }
     bool hasSamePopupClient(WebPagePopupImpl* other) { return other && m_popupClient == other->m_popupClient; }
 
 private:
     // WebWidget functions
     virtual WebSize size() OVERRIDE;
     virtual void animate(double) OVERRIDE;
     virtual void layout() OVERRIDE;
+    virtual void enterForceCompositingMode(bool enter) OVERRIDE;
+    virtual void didExitCompositingMode() OVERRIDE;
+    virtual void willCloseLayerTreeView() OVERRIDE;
     virtual void paint(WebCanvas*, const WebRect&, PaintOptions = ReadbackFromCompositorIfAvailable) OVERRIDE;
     virtual void resize(const WebSize&) OVERRIDE;
     virtual void close() OVERRIDE;
     virtual bool handleInputEvent(const WebInputEvent&) OVERRIDE;
     virtual void setFocus(bool) OVERRIDE;
     virtual bool isPagePopup() const OVERRIDE { return true; }
 
     // PageWidgetEventHandler functions
     virtual bool handleKeyEvent(const WebKeyboardEvent&) OVERRIDE;
     virtual bool handleCharEvent(const WebKeyboardEvent&) OVERRIDE;
     virtual bool handleGestureEvent(const WebGestureEvent&) OVERRIDE;
 
     explicit WebPagePopupImpl(WebWidgetClient*);
     bool initializePage();
     void destroyPage();
+    void setRootGraphicsLayer(WebCore::GraphicsLayer*);
+    void setIsAcceleratedCompositingActive(bool enter);
 
     WebWidgetClient* m_widgetClient;
     WebRect m_windowRectInScreen;
     WebViewImpl* m_webView;
     OwnPtr<WebCore::Page> m_page;
     OwnPtr<PagePopupChromeClient> m_chromeClient;
     WebCore::PagePopupClient* m_popupClient;
     bool m_closing;
 
+    WebLayerTreeView* m_layerTreeView;
+    WebLayer* m_rootLayer;
+    WebCore::GraphicsLayer* m_rootGraphicsLayer;
+    bool m_isAcceleratedCompositingActive;
+
     friend class WebPagePopup;
     friend class PagePopupChromeClient;
 };
 
 DEFINE_TYPE_CASTS(WebPagePopupImpl, WebWidget, widget, widget->isPagePopup(), widget.isPagePopup());
 // WebPagePopupImpl is the only implementation of WebCore::PagePopup, so no
 // further checking required.
 DEFINE_TYPE_CASTS(WebPagePopupImpl, WebCore::PagePopup, popup, true, true);
 
 } // namespace blink
 #endif // WebPagePopupImpl_h