Additional fixes for prerender/instant + browsing history.

chrome/browser/prerender/prerender_contents.cc

 // 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.
 
 #include "chrome/browser/prerender/prerender_contents.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/process_util.h"
@@ skipping 584 matching lines @@
   if (!prerender_contents_.get())
     return NULL;
   DictionaryValue* dict_value = new DictionaryValue();
   dict_value->SetString("url", prerender_url_.spec());
   base::TimeTicks current_time = base::TimeTicks::Now();
   base::TimeDelta duration = current_time - load_start_time_;
   dict_value->SetInteger("duration", duration.InSeconds());
   return dict_value;
 }
 
+bool PrerenderContents::IsCrossSiteNavigationPending() const {
+  if (!prerender_contents_.get() || !prerender_contents_->tab_contents())
+    return false;
+  const TabContents* tab_contents = prerender_contents_->tab_contents();
+  return (tab_contents->GetSiteInstance() !=
+          tab_contents->GetPendingSiteInstance());
+}
+
+
 }  // namespace prerender