Plumb initiator out of Blink.

third_party/WebKit/Source/core/loader/FrameLoader.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * 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:
@@ skipping 185 matching lines @@
                                        Document*);
 
   HistoryItem* currentItem() const { return m_currentItem.get(); }
   void saveScrollState();
 
   void restoreScrollPositionAndViewState();
 
   // The navigation should only be continued immediately in this frame if this
   // returns NavigationPolicyCurrentTab.
   NavigationPolicy shouldContinueForNavigationPolicy(
+      Document* originDocument,
       const ResourceRequest&,
       const SubstituteData&,
       DocumentLoader*,
       ContentSecurityPolicyDisposition,
       NavigationType,
       NavigationPolicy,
       FrameLoadType,
       bool isClientRedirect,
       HTMLFormElement*);
 
@@ skipping 111 matching lines @@
 
   SandboxFlags m_forcedSandboxFlags;
 
   bool m_dispatchingDidClearWindowObjectInMainWorld;
   bool m_protectProvisionalLoader;
 };
 
 }  // namespace blink
 
 #endif  // FrameLoader_h