Created web::UserAgentType.

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 1571 matching lines @@
 
 - (void)openAppStore:(NSString*)appId {
   [storeKitLauncher_ openAppStore:appId];
 }
 
 - (BOOL)usesDesktopUserAgent {
   if (!self.navigationManager)
     return NO;
 
   web::NavigationItem* visibleItem = self.navigationManager->GetVisibleItem();
-  return visibleItem && visibleItem->IsOverridingUserAgent();
+  return visibleItem &&
+         visibleItem->GetUserAgentType() == web::UserAgentType::DESKTOP;
 }
 
 - (void)enableDesktopUserAgent {
   DCHECK_EQ(self.usesDesktopUserAgent, NO);
   DCHECK([self navigationManager]);
   [self navigationManager]->OverrideDesktopUserAgentForNextPendingItem();
 }
 
 - (void)reloadForDesktopUserAgent {
   // |loadWithParams| will recreate the removed UIWebView.
@@ skipping 644 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end