Prepare for remote->local frame swap

public/web/WebFrame.h

Index: public/web/WebFrame.h
diff --git a/public/web/WebFrame.h b/public/web/WebFrame.h
index 0250a19423b095f1649b85f50ec182784bb24d27..9efe81b765da7b714f7ade91dd4cea14608237ef 100644
--- a/public/web/WebFrame.h
+++ b/public/web/WebFrame.h
@@ -204,6 +204,12 @@ public:
     // Removes the given child from this frame.
     virtual void removeChild(WebFrame*);
 
+    // Sets the parent WITHOUT fulling adding it to the frame tree.
+    // Used to lie to a local frame that is replacing a remote frame,
+    // so it can properly start a navigation but wait to swap until
+    // commit-time.
+    void setParent(WebFrame*);

[dcheng, 2014/10/15 21:14:35]

Nit: maybe call it setParentForProvisionalNavigation() or something? Also, this
doesn't need to be publicly exposed, right? It looks like only Blink calls it.

[Nate Chapin, 2014/10/15 21:27:31]

I only did it this way because m_parent is private, I guess I could make it
protected?

[dcheng, 2014/10/16 00:39:07]

Yeah, I think making it protected would be better.

[Nate Chapin, 2014/10/16 21:45:56]

Done.

+
     // Returns the parent frame or 0 if this is a top-most frame.
     BLINK_EXPORT WebFrame* parent() const;