Prepare for remote->local frame swap

public/web/WebFrame.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 186 matching lines @@
     // Reset the frame that opened this frame to 0.
     // This is executed between layout tests runs
     void clearOpener() { setOpener(0); }
 
     // Adds the given frame as a child of this frame.
     BLINK_EXPORT void appendChild(WebFrame*);
 
     // 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;
 
     // Returns the top-most frame in the hierarchy containing this frame.
     BLINK_EXPORT WebFrame* top() const;
 
     // Returns the first/last child frame.
     BLINK_EXPORT WebFrame* firstChild() const;
     BLINK_EXPORT WebFrame* lastChild() const;
 
@@ skipping 470 matching lines @@
     WebPrivateOwnPtr<OpenedFrameTracker> m_openedFrameTracker;
 };
 
 #if BLINK_IMPLEMENTATION
 Frame* toCoreFrame(const WebFrame*);
 #endif
 
 } // namespace blink
 
 #endif