Expose the initiating origin/URL of a navigation in the Blink public API

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

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
  * reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 154 matching lines @@
   virtual void didObserveLoadingBehavior(WebLoadingBehaviorFlag) {}
 
   // Transmits the change in the set of watched CSS selectors property that
   // match any element on the frame.
   virtual void selectorMatchChanged(const Vector<String>& addedSelectors,
                                     const Vector<String>& removedSelectors) = 0;
 
   virtual DocumentLoader* createDocumentLoader(LocalFrame*,
                                                const ResourceRequest&,
                                                const SubstituteData&,
-                                               ClientRedirectPolicy) = 0;
+                                               ClientRedirectPolicy,
+                                               Document* requestorDocument) = 0;
 
   virtual String userAgent() = 0;
 
   virtual String doNotTrackValue() = 0;
 
   virtual void transitionToCommittedForNewPage() = 0;
 
   virtual LocalFrame* createFrame(const FrameLoadRequest&,
                                   const AtomicString& name,
                                   HTMLFrameOwnerElement*) = 0;
@@ skipping 150 matching lines @@
   }
 
   // Overwrites the given URL to use an HTML5 embed if possible. An empty URL is
   // returned if the URL is not overriden.
   virtual KURL overrideFlashEmbedWithHTML(const KURL&) { return KURL(); }
 };
 
 }  // namespace blink
 
 #endif  // FrameLoaderClient_h