Add pixel readback to page popup

Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 179 matching lines @@
     virtual void needTouchEvents(bool) = 0;
 
     virtual void setTouchAction(TouchAction) = 0;
 
     // Checks if there is an opened popup, called by RenderMenuList::showPopup().
     virtual bool hasOpenedPopup() const = 0;
     virtual PassRefPtr<PopupMenu> createPopupMenu(LocalFrame&, PopupMenuClient*) const = 0;
     // For testing.
     virtual void setPagePopupDriver(PagePopupDriver*) = 0;
     virtual void resetPagePopupDriver() = 0;
+    virtual PagePopupDriver* pagePopupDriver() const = 0;
 
     virtual void postAccessibilityNotification(AXObject*, AXObjectCache::AXNotification) { }
     virtual String acceptLanguages() = 0;
 
     enum DialogType {
         AlertDialog = 0,
         ConfirmDialog = 1,
         PromptDialog = 2,
         HTMLDialog = 3
     };
@@ skipping 22 matching lines @@
     virtual void willSetInputMethodState() { }
     virtual void didUpdateTextOfFocusedElementByNonUserInput() { }
     virtual void showImeIfNeeded() { }
 
 protected:
     virtual ~ChromeClient() { }
 };
 
 }
 #endif // ChromeClient_h