Load offline page if reading list entry takes more than 1s to load.

ios/web/web_state/ui/crw_web_controller.mm

 // Copyright 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.
 
 #import "ios/web/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #import <objc/runtime.h>
 #include <stddef.h>
@@ skipping 1971 matching lines @@
         [self currentSessionEntry].navigationItemImpl;
     DCHECK(addedItem);
     if (params.extra_headers)
       addedItem->AddHttpRequestHeaders(params.extra_headers);
     if (params.post_data) {
       DCHECK([addedItem->GetHttpRequestHeaders() objectForKey:@"Content-Type"])
           << "Post data should have an associated content type";
       addedItem->SetPostData(params.post_data);
       addedItem->SetShouldSkipResubmitDataConfirmation(true);
     }
+    addedItem->extra_data_.reset([originalParams.extra_data retain]);
   }
 
   [_delegate webDidUpdateSessionForLoadWithParams:params
                              wasInitialNavigation:initialNavigation];
 
   [self loadCurrentURL];
 }
 
 - (void)loadCurrentURL {
   // If the content view doesn't exist, the tab has either been evicted, or
@@ skipping 3623 matching lines @@
   }
 
   return web::WEB_VIEW_DOCUMENT_TYPE_GENERIC;
 }
 
 - (NSString*)refererFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:@"Referer"];
 }
 
 @end