Move the offline URL trimming to GetFormattedURL.

ios/web/public/test/test_navigation_manager.mm

 // 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.
 
 #import "ios/web/public/test/test_navigation_manager.h"
 
 namespace web {
 
 TestNavigationManager::TestNavigationManager() {}
 
 TestNavigationManager::~TestNavigationManager() {}
 
 BrowserState* TestNavigationManager::GetBrowserState() const {
   NOTREACHED();
   return nullptr;
 }
 
 WebState* TestNavigationManager::GetWebState() const {
   NOTREACHED();
   return nullptr;
 }
 
 NavigationItem* TestNavigationManager::GetVisibleItem() const {
-  NOTREACHED();
-  return nullptr;
+  return visible_item_;
+}
+
+void TestNavigationManager::SetVisibleItem(NavigationItem* item) {
+  visible_item_ = item;
 }
 
 NavigationItem* TestNavigationManager::GetLastCommittedItem() const {
   return last_committed_item_;
 }
 
 void TestNavigationManager::SetLastCommittedItem(NavigationItem* item) {
   last_committed_item_ = item;
 }
 
@@ skipping 91 matching lines @@
   NOTREACHED();
   return;
 }
 
 void TestNavigationManager::Reload(bool check_for_repost) {
   NOTREACHED();
   return;
 }
 
 }  // namespace web