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

third_party/WebKit/public/web/WebDataSource.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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebDataSource_h
 #define WebDataSource_h
 
 #include "../platform/WebCommon.h"
 #include "WebNavigationType.h"
-#include "WebTextDirection.h"
 
 namespace blink {
 
 class WebDocumentSubresourceFilter;
 class WebURL;
 class WebURLRequest;
 class WebURLResponse;
 template <typename T>
 class WebVector;
 
 class WebDataSource {
  public:
   class ExtraData {
    public:
     virtual ~ExtraData() {}
   };
 
+  // Returns the URL of the document that triggered the creation of this
+  // datasource. Will return an empty URL once this datasource commits.
+  virtual WebURL requestorURL() const = 0;
+
   // Returns the original request that resulted in this datasource.
   virtual const WebURLRequest& originalRequest() const = 0;
 
   // Returns the request corresponding to this datasource.  It may
   // include additional request headers added by WebKit that were not
   // present in the original request.  This request may also correspond
   // to a location specified by a redirect that was followed.
   virtual const WebURLRequest& request() const = 0;
 
   // Returns the response associated with this datasource.
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   // datasource is destroyed or when a new filter is set.
   virtual void setSubresourceFilter(WebDocumentSubresourceFilter*) = 0;
 
  protected:
   ~WebDataSource() {}
 };
 
 }  // namespace blink
 
 #endif