OOPIF: Support session restore by combining/splitting frame PageStates.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index da841da04ba9822298635707c3de75a936dd6ed7..747760bf53ba26e833877dde46794831ffbcec48 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -4238,6 +4238,7 @@ void WebContentsImpl::UpdateStateForFrame(RenderFrameHost* render_frame_host,
     return;  // Nothing to update.
 
   frame_entry->set_page_state(page_state);
+  entry->UpdatePageState();
   controller_.NotifyEntryChanged(entry);
 }