Also update the session history in the renderer when the active entry is a new pending entry

content/browser/web_contents/navigation_controller_impl.cc

 // 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.
 
 #include "content/browser/web_contents/navigation_controller_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 1387 matching lines @@
     web_contents_->UpdateMaxPageIDForSiteInstance(site_instance.get(),
                                                   max_page_id);
   }
 }
 
 void NavigationControllerImpl::PruneAllButActive() {
   PruneAllButActiveInternal();
 
   // If there is an entry left, we need to update the session history length of
   // the RenderView.
-  if (!GetEntryCount())
+  if (!GetActiveEntry())
     return;
 
   NavigationEntryImpl* entry =
       NavigationEntryImpl::FromNavigationEntry(GetActiveEntry());
-  CHECK(entry);
   // We pass 0 instead of GetEntryCount() for the history_length parameter of
   // SetHistoryLengthAndPrune, because it will create history_length additional
   // history entries.
   // TODO(jochen): This API is confusing and we should clean it up.
   // http://crbug.com/178491
   web_contents_->SetHistoryLengthAndPrune(
       entry->site_instance(), 0, entry->GetPageID());
 }
 
 void NavigationControllerImpl::PruneAllButActiveInternal() {
@@ skipping 388 matching lines @@
     const base::Callback<base::Time()>& get_timestamp_callback) {
   get_timestamp_callback_ = get_timestamp_callback;
 }
 
 void NavigationControllerImpl::SetTakeScreenshotCallbackForTest(
     const base::Callback<void(RenderViewHost*)>& take_screenshot_callback) {
   take_screenshot_callback_ = take_screenshot_callback;
 }
 
 }  // namespace content