Converted CRWSessionController to use NavigationItems.

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 1329 matching lines @@
 
     if (!finalURL.is_valid()) {
       return NO;
     }
   }
 
   if ([externalAppLauncher_ openURL:finalURL linkClicked:linkClicked]) {
     // Clears pending navigation history after successfully launching the
     // external app.
     DCHECK([self navigationManager]);
-    [[self navigationManager]->GetSessionController()
-            discardNonCommittedEntries];
+    [[self navigationManager]->GetSessionController() discardNonCommittedItems];
     // Ensure the UI reflects the current entry, not the just-discarded pending
     // entry.
     [parentTabModel_ notifyTabChanged:self];
     return YES;
   }
   return NO;
 }
 
 - (void)webWillFinishHistoryNavigationFromEntry:(CRWSessionEntry*)fromEntry {
   [parentTabModel_ notifyTabChanged:self];
@@ skipping 165 matching lines @@
 
 - (BOOL)useDesktopUserAgent {
   web::NavigationItem* currentItem = self.currentSessionEntry.navigationItem;
   return currentItem && currentItem->IsOverridingUserAgent();
 }
 
 - (void)enableDesktopUserAgent {
   DCHECK_EQ(self.useDesktopUserAgent, NO);
   DCHECK([self navigationManager]);
   [[self navigationManager]->GetSessionController()
-          useDesktopUserAgentForNextPendingEntry];
+          useDesktopUserAgentForNextPendingItem];
 }
 
 - (void)reloadForDesktopUserAgent {
   // |loadWithParams| will recreate the removed UIWebView.
   [self.webController requirePageReconstruction];
 
-  // TODO(crbug.com/228171): A hack in session_controller -addPendingEntry
+  // 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 navigationManager]->GetSessionController();
   CRWSessionEntry* lastUserEntry = [sessionController lastUserEntry];
@@ skipping 702 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end