Create RenderFrameProxyHost at time of swap-out instead of commit.

content/browser/renderer_host/render_view_host_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 215 matching lines @@
   // Set up the RenderView child process. Virtual because it is overridden by
   // TestRenderViewHost. If the |frame_name| parameter is non-empty, it is used
   // as the name of the new top-level frame.
   // The |opener_route_id| parameter indicates which RenderView created this
   // (MSG_ROUTING_NONE if none). If |max_page_id| is larger than -1, the
   // RenderView is told to start issuing page IDs at |max_page_id| + 1.
   // |window_was_created_with_opener| is true if this top-level frame was
   // created with an opener. (The opener may have been closed since.)
   virtual bool CreateRenderView(const base::string16& frame_name,
                                 int opener_route_id,
+                                int proxy_route_id,

[Charlie Reis, 2014/05/15 22:55:00]

Let's mention this in the comment (e.g., that it's only used when the RenderView
is created in a swapped out state).

[nasko, 2014/05/15 23:36:49]

Done.

                                 int32 max_page_id,
                                 bool window_was_created_with_opener);
 
   base::TerminationStatus render_view_termination_status() const {
     return render_view_termination_status_;
   }
 
   // Returns the content specific prefs for this RenderViewHost.
   WebPreferences GetWebkitPrefs(const GURL& url);
 
@@ skipping 399 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_