Add pixel readback to page popup

Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 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.
  *
  * 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
@@ skipping 101 matching lines @@
     virtual void closeWindowSoon() OVERRIDE { }
 
     virtual void runJavaScriptAlert(LocalFrame*, const String&) OVERRIDE { }
     virtual bool runJavaScriptConfirm(LocalFrame*, const String&) OVERRIDE { return false; }
     virtual bool runJavaScriptPrompt(LocalFrame*, const String&, const String&, String&) OVERRIDE { return false; }
 
     virtual bool hasOpenedPopup() const OVERRIDE { return false; }
     virtual PassRefPtr<PopupMenu> createPopupMenu(LocalFrame&, PopupMenuClient*) const OVERRIDE;
     virtual void setPagePopupDriver(PagePopupDriver*) OVERRIDE { }
     virtual void resetPagePopupDriver() OVERRIDE { }
+    virtual PagePopupDriver* pagePopupDriver() const OVERRIDE { return nullptr; }
 
     virtual void setStatusbarText(const String&) OVERRIDE { }
 
     virtual bool tabsToLinks() OVERRIDE { return false; }
 
     virtual IntRect windowResizerRect() const OVERRIDE { return IntRect(); }
 
     virtual void invalidateContentsAndRootView(const IntRect&) OVERRIDE { }
     virtual void invalidateContentsForSlowScroll(const IntRect&) OVERRIDE { }
     virtual void scheduleAnimation() OVERRIDE { }
@@ skipping 200 matching lines @@
 public:
     virtual PassOwnPtr<StorageNamespace> createSessionStorageNamespace() OVERRIDE;
     virtual bool canAccessStorage(LocalFrame*, StorageType) const OVERRIDE { return false; }
 };
 
 void fillWithEmptyClients(Page::PageClients&);
 
 }
 
 #endif // EmptyClients_h