[Experimental] Supporting OOPIF printing

third_party/WebKit/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 435 matching lines @@
   unsigned backForwardLength() override { return 0; }
   void forwardPostMessage(MessageEvent*,
                           PassRefPtr<SecurityOrigin> target,
                           LocalFrame* sourceFrame) const override {}
   void forwardInputEvent(Event*) override {}
   void frameRectsChanged(const IntRect& frameRect) override {}
   void updateRemoteViewportIntersection(
       const IntRect& viewportIntersection) override {}
   void advanceFocus(WebFocusType, LocalFrame* source) override {}
   void visibilityChanged(bool visible) override {}
+  int print(const IntRect& size, int id) override { return 0; }
 
   // FrameClient implementation.
   bool inShadowTree() const override { return false; }
   void willBeDetached() override {}
   void detached(FrameDetachType) override {}
   Frame* opener() const override { return nullptr; }
   void setOpener(Frame*) override {}
   Frame* parent() const override { return nullptr; }
   Frame* top() const override { return nullptr; }
   Frame* nextSibling() const override { return nullptr; }
   Frame* firstChild() const override { return nullptr; }
   void frameFocused() const override {}
 };
 
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 }  // namespace blink
 
 #endif  // EmptyClients_h