Always swap with a replacement proxy in OnSwapOut.

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 165 matching lines @@
       int proxy_route_id,
       int32_t max_page_id,
       const FrameReplicationState& replicated_frame_state,
       bool window_was_created_with_opener);
 
   base::TerminationStatus render_view_termination_status() const {
     return render_view_termination_status_;
   }
 
   // Tracks whether this RenderViewHost is in an active state (rather than
-  // pending swap out, pending deletion, or swapped out), according to its main
-  // frame RenderFrameHost.
+  // pending swap out or swapped out), according to its main frame
+  // RenderFrameHost.
   bool is_active() const { return is_active_; }
   void set_is_active(bool is_active) { is_active_ = is_active; }
 
   // Tracks whether this RenderViewHost is swapped out, according to its main
   // frame RenderFrameHost.
   void set_is_swapped_out(bool is_swapped_out) {
     is_swapped_out_ = is_swapped_out;
   }
 
   // TODO(creis): Remove as part of http://crbug.com/418265.
@@ skipping 211 matching lines @@
   bool render_view_ready_on_process_launch_;
 
   base::WeakPtrFactory<RenderViewHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_