Remove stale frame ID references for RequestTransferURL.

content/public/browser/page_navigator.h

Index: content/public/browser/page_navigator.h
diff --git a/content/public/browser/page_navigator.h b/content/public/browser/page_navigator.h
index 7cd9afbadbf407c966166a0a2bd89b1f4d006710..849d4ca68b194bbe6743c7a83b582fc5195128d9 100644
--- a/content/public/browser/page_navigator.h
+++ b/content/public/browser/page_navigator.h
@@ -32,7 +32,6 @@ struct CONTENT_EXPORT OpenURLParams {
                 bool is_renderer_initiated);
   OpenURLParams(const GURL& url,
                 const Referrer& referrer,
-                int64 source_frame_id,
                 int64 frame_tree_node_id,
                 WindowOpenDisposition disposition,
                 PageTransition transition,
@@ -60,10 +59,6 @@ struct CONTENT_EXPORT OpenURLParams {
   // is terminated by \r\n.  May be empty if no extra headers are needed.
   std::string extra_headers;
 
-  // The renderer-specific source frame id or -1 to indicate the main frame.
-  // TODO(creis): This appears to be dead code and should be removed.
-  int64 source_frame_id;
-
   // The browser-global FrameTreeNode ID or -1 to indicate the main frame.
   int64 frame_tree_node_id;