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

third_party/WebKit/Source/web/WebDataSourceImpl.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #ifndef WebDataSourceImpl_h
 #define WebDataSourceImpl_h
 
 #include "core/frame/FrameTypes.h"
 #include "core/loader/DocumentLoader.h"
 #include "platform/exported/WrappedResourceRequest.h"
 #include "platform/exported/WrappedResourceResponse.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
+#include "public/platform/WebURL.h"
 #include "public/web/WebDataSource.h"
 #include "wtf/Vector.h"
 #include <memory>
 
 namespace blink {
 
 class WebDataSourceImpl final : public DocumentLoader, public WebDataSource {
  public:
   static WebDataSourceImpl* create(LocalFrame*,
                                    const ResourceRequest&,
                                    const SubstituteData&,
-                                   ClientRedirectPolicy);
+                                   ClientRedirectPolicy,
+                                   Document* requestorDocument);
 
   static WebDataSourceImpl* fromDocumentLoader(DocumentLoader* loader) {
     return static_cast<WebDataSourceImpl*>(loader);
   }
 
   // WebDataSource methods:
+  WebURL requestorURL() const override;
   const WebURLRequest& originalRequest() const override;
   const WebURLRequest& request() const override;
   const WebURLResponse& response() const override;
   bool hasUnreachableURL() const override;
   WebURL unreachableURL() const override;
   void appendRedirect(const WebURL&) override;
   void redirectChain(WebVector<WebURL>&) const override;
   bool isClientRedirect() const override;
   bool replacesCurrentHistoryItem() const override;
   WebNavigationType navigationType() const override;
   ExtraData* getExtraData() const override;
   void setExtraData(ExtraData*) override;
   void setNavigationStartTime(double) override;
   void updateNavigation(double redirectStartTime,
                         double redirectEndTime,
                         double fetchStartTime,
                         const WebVector<WebURL>& redirectChain) override;
   void setSubresourceFilter(WebDocumentSubresourceFilter*) override;
 
   static WebNavigationType toWebNavigationType(NavigationType);
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   WebDataSourceImpl(LocalFrame*,
                     const ResourceRequest&,
                     const SubstituteData&,
-                    ClientRedirectPolicy);
+                    ClientRedirectPolicy,
+                    Document* requestorDocument);
   ~WebDataSourceImpl() override;
   void detachFromFrame() override;
   String debugName() const override { return "WebDataSourceImpl"; }
 
   // Mutable because the const getters will magically sync these to the
   // latest version from WebKit.
   mutable WrappedResourceRequest m_originalRequestWrapper;
   mutable WrappedResourceRequest m_requestWrapper;
   mutable WrappedResourceResponse m_responseWrapper;
 
   std::unique_ptr<ExtraData> m_extraData;
 };
 
 }  // namespace blink
 
 #endif  // WebDataSourceImpl_h