Properly recreate swapped out RenderView.

content/browser/frame_host/render_frame_host_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/render_frame_host_manager.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 1775 matching lines @@
     // Prevent the process from exiting while we're trying to use it.
     if (!swapped_out) {
       new_render_frame_host = proxy->PassFrameHostOwnership();
       new_render_frame_host->GetProcess()->AddPendingView();
 
       proxy_hosts_->Remove(instance->GetId());
       // NB |proxy| is deleted at this point.
 
       // If we are reusing the RenderViewHost and it doesn't already have a
       // RenderWidgetHostView, we need to create one if this is the main frame.
-      if (!render_view_host->GetWidget()->GetView() &&
+      if (render_view_host->IsRenderViewLive() &&
+          !render_view_host->GetWidget()->GetView() &&
           frame_tree_node_->IsMainFrame()) {
         delegate_->CreateRenderWidgetHostViewForRenderManager(render_view_host);
       }
     }
   } else {
     // Create a new RenderFrameHost if we don't find an existing one.
 
     int32 widget_routing_id = MSG_ROUTING_NONE;
-    proxy = nullptr;

[nasko, 2015/10/22 23:48:09]

This is the main part of this fix. When a proxy exists, it must be recreated on
the renderer side. Not nulling the pointer here will allow this to happen later
in this method as part of InitRenderView.

 
     // A RenderFrame in a different process from its parent RenderFrame
     // requires a RenderWidget for input/layout/painting.
     if (frame_tree_node_->parent() &&
         frame_tree_node_->parent()->current_frame_host()->GetSiteInstance() !=
             instance) {
       CHECK(SiteIsolationPolicy::AreCrossProcessFramesPossible());
       widget_routing_id = instance->GetProcess()->GetNextRoutingID();
     }
 
@@ skipping 832 matching lines @@
 int RenderFrameHostManager::GetOpenerRoutingID(SiteInstance* instance) {
   if (!frame_tree_node_->opener())
     return MSG_ROUTING_NONE;
 
   return frame_tree_node_->opener()
       ->render_manager()
       ->GetRoutingIdForSiteInstance(instance);
 }
 
 }  // namespace content