Send port-closed notification when a frame with ports unloads....

webkit/glue/webframe_impl.cc

Index: webkit/glue/webframe_impl.cc
===================================================================
--- webkit/glue/webframe_impl.cc	(revision 18701)
+++ webkit/glue/webframe_impl.cc	(working copy)
@@ -687,6 +687,20 @@
   return NULL;
 }
 
+WebFrame* WebFrameImpl::GetFirstChild() const {
+  if (frame_ && frame_->tree()->firstChild())
+    return FromFrame(frame_->tree()->firstChild());
+
+  return NULL;
+}
+
+WebFrame* WebFrameImpl::GetNextSibling() const {
+  if (frame_ && frame_->tree()->nextSibling())
+    return FromFrame(frame_->tree()->nextSibling());
+
+  return NULL;
+}
+
 WebFrame* WebFrameImpl::GetChildFrame(const std::wstring& xpath) const {
   // xpath string can represent a frame deep down the tree (across multiple
   // frame DOMs).