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webkit/glue/webframe.h

Index: webkit/glue/webframe.h
===================================================================
--- webkit/glue/webframe.h	(revision 18701)
+++ webkit/glue/webframe.h	(working copy)
@@ -191,6 +191,13 @@
   // Returns the top-most frame in the frame hierarchy containing this frame.
   virtual WebFrame* GetTop() const = 0;
 
+  // Returns the first child frame of this frame, or NULL if it has no children.
+  virtual WebFrame* GetFirstChild() const = 0;
+
+  // Returns the next sibling frame of this frame, or NULL if there are no more
+  // siblings.
+  virtual WebFrame* GetNextSibling() const = 0;
+
   // Returns the child frame with the given xpath.
   // The document of this frame is used as the context node.
   // The xpath may need a recursive traversal if non-trivial