Plumbing toward transitioning remote frame back to a local frame.

Source/core/frame/Frame.h

Index: Source/core/frame/Frame.h
diff --git a/Source/core/frame/Frame.h b/Source/core/frame/Frame.h
index 498cb77c81bfd740d26d1fdc0c02b6131f656796..173bbba5f02864bdb2b68a4730a296f522c61054 100644
--- a/Source/core/frame/Frame.h
+++ b/Source/core/frame/Frame.h
@@ -30,6 +30,8 @@
 
 #include "core/page/FrameTree.h"
 #include "platform/heap/Handle.h"
+#include "platform/weborigin/KURL.h"
+#include "platform/weborigin/Referrer.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
@@ -40,6 +42,7 @@ class WebLayer;
 namespace blink {
 
 class ChromeClient;
+class Document;
 class FrameClient;
 class FrameHost;
 class FrameOwner;
@@ -56,6 +59,7 @@ public:
 
     virtual ~Frame();
 
+    virtual void navigate(Document& originDocument, const KURL&, const Referrer&, bool lockBackForwardList) = 0;
     virtual void detach() = 0;
     void detachChildren();