Adding offline navigations to the previews blacklist

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 "chrome/browser/android/offline_pages/offline_page_request_job.h"
@@ skipping 38 matching lines @@
 
   // This is a new navigation so we can invalidate any previously scheduled
   // operations.
   weak_ptr_factory_.InvalidateWeakPtrs();
   reloading_url_on_net_error_ = false;
 
   // The provisional offline info can be cleared no matter how.
   provisional_offline_info_.Clear();
 
   // If not a fragment navigation, clear the cached offline info.
-  if (offline_info_.offline_page.get() &&
-      !OfflinePageUtils::EqualsIgnoringFragment(offline_info_.offline_page->url,
-                                                navigation_handle->GetURL())) {
+  if (offline_info_.offline_page.get() && !navigation_handle->IsSamePage()) {
     offline_info_.Clear();
   }
 }
 
 void OfflinePageTabHelper::DidFinishNavigation(
     content::NavigationHandle* navigation_handle) {
   // Skips non-main frame.
   if (!navigation_handle->IsInMainFrame())
     return;
 
@@ skipping 107 matching lines @@
 }
 
 bool OfflinePageTabHelper::IsShowingOfflinePreview() const {
   // TODO(ryansturm): Change this once offline pages infrastructure uses
   // NavigationHandle instead of a back channel. crbug.com/658899
   return provisional_offline_info_.is_showing_offline_preview ||
          offline_info_.is_showing_offline_preview;
 }
 
 }  // namespace offline_pages