[Offline Pages] Allows offline redirection to offline pages with Aync Loading namespace.

chrome/browser/android/offline_pages/offline_page_tab_helper.cc

 // Copyright 2016 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/android/offline_pages/offline_page_tab_helper.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram.h"
@@ skipping 194 matching lines @@
   // page, so we can leave.
   std::string tab_id;
   if (!delegate_->GetTabId(web_contents(), &tab_id)) {
     ReportRedirectResultUMA(RedirectResult::NO_TAB_ID);
     return;
   }
 
   const OfflinePageItem* selected_page = nullptr;
   for (const auto& offline_page : pages) {
     if ((offline_page.client_id.name_space == kBookmarkNamespace) ||
+        (offline_page.client_id.name_space == kAsyncNamespace) ||
         (offline_page.client_id.name_space == kLastNNamespace &&
          offline_page.client_id.id == tab_id)) {
       if (!selected_page ||
           offline_page.creation_time > selected_page->creation_time) {
         selected_page = &offline_page;
       }
     }
   }
 
   if (!selected_page) {
@@ skipping 41 matching lines @@
          !entry->GetRedirectChain().empty() &&
          entry->GetRedirectChain().back() == to_url;
 }
 
 void OfflinePageTabHelper::ReportRedirectResultUMA(RedirectResult result) {
   UMA_HISTOGRAM_ENUMERATION("OfflinePages.RedirectResult",
       static_cast<int>(result),
       static_cast<int>(RedirectResult::REDIRECT_RESULT_MAX));
 }
 }  // namespace offline_pages