Remove kSwappedOutURL as it is now unused.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index f7a8df7e8c6e19507051e96161d10b46a9f5f456..e66153301e131007be323524a5fb471c5d6fb51e 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1501,10 +1501,6 @@ void RenderViewImpl::SendUpdateState() {
   if (!entry)
     return;
 
-  // Don't send state updates for kSwappedOutURL.
-  if (entry->root().urlString() == kSwappedOutURL)
-    return;
-
   Send(new ViewHostMsg_UpdateState(GetRoutingID(), page_id_,
                                    HistoryEntryToPageState(entry)));
 }