[DRAFT] Create RenderFrameHostManager.

content/browser/frame_host/interstitial_page_impl.cc

Index: content/browser/frame_host/interstitial_page_impl.cc
diff --git a/content/browser/frame_host/interstitial_page_impl.cc b/content/browser/frame_host/interstitial_page_impl.cc
index 8d33a46deaec930772d6981c03b29118115770de..4aa878bedc38aacb7c83971d7cd5c072ad720c02 100644
--- a/content/browser/frame_host/interstitial_page_impl.cc
+++ b/content/browser/frame_host/interstitial_page_impl.cc
@@ -162,7 +162,8 @@ InterstitialPageImpl::InterstitialPageImpl(
       // TODO(creis): We will also need to pass delegates for the RVHM as we
       // start to use it.
       frame_tree_(new InterstitialPageNavigatorImpl(this, controller_),
-                  this, this, this, NULL),
+                  this, this, this,
+                  static_cast<WebContentsImpl*>(web_contents)),
       original_child_id_(web_contents->GetRenderProcessHost()->GetID()),
       original_rvh_id_(web_contents->GetRenderViewHost()->GetRoutingID()),
       should_revert_web_contents_title_(false),
@@ -238,7 +239,8 @@ void InterstitialPageImpl::Show() {
 
   DCHECK(!render_view_host_);
   render_view_host_ = static_cast<RenderViewHostImpl*>(CreateRenderViewHost());
-  render_view_host_->AttachToFrameTree();
+  // TODO(creis): Is this necessary?  If so, move into CreateRenderViewHost.
+  frame_tree_.ResetForMainFrameSwap();
   CreateWebContentsView();
 
   std::string data_url = "data:text/html;charset=utf-8," +