Adds NavigationManager util functions to ios/chrome/browser/web/

ios/chrome/browser/tabs/tab.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/chrome/browser/tabs/tab.h"
 
 #import <CoreLocation/CoreLocation.h>
 #import <UIKit/UIKit.h>
 
 #include <utility>
@@ skipping 87 matching lines @@
 #import "ios/chrome/browser/ui/fullscreen_controller.h"
 #import "ios/chrome/browser/ui/open_in_controller.h"
 #import "ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.h"
 #import "ios/chrome/browser/ui/prerender_delegate.h"
 #import "ios/chrome/browser/ui/reader_mode/reader_mode_checker.h"
 #import "ios/chrome/browser/ui/reader_mode/reader_mode_controller.h"
 #import "ios/chrome/browser/ui/sad_tab/sad_tab_view.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/web/auto_reload_bridge.h"
 #import "ios/chrome/browser/web/external_app_launcher.h"
+#include "ios/chrome/browser/web/navigation_manager_util.h"

[Eugene But (OOO till 7-30), 2017/03/17 14:32:04]

s/include/import

[pkl (ping after 24h if needed), 2017/03/17 20:23:52]

Done.

 #import "ios/chrome/browser/web/passkit_dialog_provider.h"
 #include "ios/chrome/browser/web/print_observer.h"
 #import "ios/chrome/browser/xcallback_parameters.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #import "ios/public/provider/chrome/browser/native_app_launcher/native_app_metadata.h"
 #import "ios/public/provider/chrome/browser/native_app_launcher/native_app_whitelist_manager.h"
 #import "ios/web/navigation/crw_session_controller.h"
 #import "ios/web/navigation/navigation_item_impl.h"
 #import "ios/web/navigation/navigation_manager_impl.h"
@@ skipping 1383 matching lines @@
   [self.webController requirePageReconstruction];
 
   // TODO(crbug.com/228171): A hack in session_controller -addPendingItem
   // discusses making tab responsible for distinguishing history stack
   // navigation from new navigations. Because we want a new navigation here, we
   // use |PAGE_TRANSITION_FORM_SUBMIT|. When session_controller changes, so
   // should this.
   ui::PageTransition transition =
       ui::PageTransitionFromInt(ui::PAGE_TRANSITION_FORM_SUBMIT);
   DCHECK([self navigationManager]);
-  CRWSessionController* sessionController =
-      [self navigationManagerImpl]->GetSessionController();
-  web::NavigationItem* lastUserItem = [sessionController lastUserItem];
+  web::NavigationItem* lastUserItem =

[Eugene But (OOO till 7-30), 2017/03/17 14:32:04]

nit: s/lastUserItem/lastNonRedirectedItem ?

[pkl (ping after 24h if needed), 2017/03/17 20:23:52]

Done.

+      GetLastNonRedirectedItem([self navigationManager]);
   if (!lastUserItem)
     return;
 
   // |originalUrl| will be empty if a page was open by DOM.
   GURL reloadURL(lastUserItem->GetOriginalRequestURL());
   if (reloadURL.is_empty()) {
-    DCHECK(sessionController.openedByDOM);
+    DCHECK(
+        [[self navigationManagerImpl]->GetSessionController() isOpenedByDOM]);
     reloadURL = lastUserItem->GetVirtualURL();
   }
 
   web::NavigationManager::WebLoadParams params(reloadURL);
   params.referrer = lastUserItem->GetReferrer();
   params.transition_type = transition;
   if (self.navigationManager)
     self.navigationManager->LoadURLWithParams(params);
 }
 
@@ skipping 573 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end