Fix for swapping in prerendered RenderViews with provisional data sources

chrome/renderer/render_view.h

 // Copyright (c) 2011 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 CHROME_RENDERER_RENDER_VIEW_H_
 #define CHROME_RENDERER_RENDER_VIEW_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 1148 matching lines @@
 
   // Holds state pertaining to a navigation that we initiated.  This is held by
   // the WebDataSource::ExtraData attribute.  We use pending_navigation_state_
   // as a temporary holder for the state until the WebDataSource corresponding
   // to the new navigation is created.  See DidCreateDataSource.
   scoped_ptr<NavigationState> pending_navigation_state_;
 
   // Timer used to delay the updating of nav state (see SyncNavigationState).
   base::OneShotTimer<RenderView> nav_state_sync_timer_;
 
+  // True if the RenderView is currently prerendering a page.
+  bool is_prerendering_;
+
   // Page IDs ------------------------------------------------------------------
   //
   // Page IDs allow the browser to identify pages in each renderer process for
   // keeping back/forward history in sync.
 
   // ID of the current page.  Note that this is NOT updated for every main
   // frame navigation, only for "regular" navigations that go into session
   // history. In particular, client redirects, like the page cycler uses
   // (document.location.href="foo") do not count as regular navigations and do
   // not increment the page id.
@@ skipping 249 matching lines @@
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can use
   // the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CHROME_RENDERER_RENDER_VIEW_H_