Handle online and offline redirects via interceptor and offline scheme

chrome/browser/android/offline_pages/offline_page_tab_helper.cc

Index: chrome/browser/android/offline_pages/offline_page_tab_helper.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_tab_helper.cc b/chrome/browser/android/offline_pages/offline_page_tab_helper.cc
index b307ad890755b9eca75a64313db1ccd2b9b7aca2..b4d8d8ca5a938afa98d42258f61aadbb19659c9e 100644
--- a/chrome/browser/android/offline_pages/offline_page_tab_helper.cc
+++ b/chrome/browser/android/offline_pages/offline_page_tab_helper.cc
@@ -83,33 +83,6 @@ void OfflinePageTabHelper::DidStartNavigation(
   GURL navigated_url = navigation_handle->GetURL();
   if (offline_page_ && navigated_url != offline_page_->GetOfflineURL())
     offline_page_ = nullptr;
-
-  // Ignore navigations that are forward or back transitions in the nav stack
-  // which are not at the head of the stack.
-  // TODO(dimich): Not sure this is needed. Clarify and remove. Bug 624216.
-  const content::NavigationController& controller =
-      web_contents()->GetController();
-  if (controller.GetEntryCount() > 0 &&
-      controller.GetCurrentEntryIndex() != -1 &&
-      controller.GetCurrentEntryIndex() < controller.GetEntryCount() - 1) {
-    return;
-  }
-
-  content::BrowserContext* context = web_contents()->GetBrowserContext();
-  if (net::NetworkChangeNotifier::IsOffline()) {
-    GetPagesForRedirectToOffline(
-        RedirectResult::REDIRECTED_ON_DISCONNECTED_NETWORK, navigated_url);
-    return;
-  }
-
-  OfflinePageModel* offline_page_model =
-      OfflinePageModelFactory::GetForBrowserContext(context);
-  if (!offline_page_model)
-    return;
-
-  offline_page_model->GetPageByOfflineURL(
-      navigated_url, base::Bind(&OfflinePageTabHelper::RedirectToOnline,
-                                weak_ptr_factory_.GetWeakPtr(), navigated_url));
 }
 
 void OfflinePageTabHelper::DidFinishNavigation(