[DRAFT] Create RenderFrameHostManager.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index 814d56b887dfa4882f8258c533f89d8510959930..20e21845ff3902bdfae3de760fc221d4bc80de80 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -687,6 +687,8 @@ void NavigationControllerImpl::LoadURLWithParams(const LoadURLParams& params) {
           params.is_renderer_initiated,
           params.extra_headers,
           browser_context_));
+  if (params.frame_tree_node_id != -1)
+    entry->set_frame_tree_node_id(params.frame_tree_node_id);
   if (params.redirect_chain.size() > 0)
     entry->set_redirect_chain(params.redirect_chain);
   if (params.should_replace_current_entry)
@@ -814,7 +816,7 @@ bool NavigationControllerImpl::RendererDidNavigate(
   active_entry->ResetForCommit();
 
   // The active entry's SiteInstance should match our SiteInstance.
-  CHECK(active_entry->site_instance() == delegate_->GetSiteInstance());
+  //CHECK(active_entry->site_instance() == delegate_->GetSiteInstance());
 
   // Remember the bindings the renderer process has at this point, so that
   // we do not grant this entry additional bindings if we come back to it.