Created web::UserAgentType.

ios/web/web_state/ui/crw_web_controller.mm

Index: ios/web/web_state/ui/crw_web_controller.mm
diff --git a/ios/web/web_state/ui/crw_web_controller.mm b/ios/web/web_state/ui/crw_web_controller.mm
index 5d3d172b208b6c4a1e921e4a8ed74959b443cbcc..e162b1a18f0827149c95b2c8217c80a24fbd7e26 100644
--- a/ios/web/web_state/ui/crw_web_controller.mm
+++ b/ios/web/web_state/ui/crw_web_controller.mm
@@ -2332,7 +2332,7 @@ - (BOOL)shouldClosePageOnNativeApplicationLoad {
 
 - (BOOL)usesDesktopUserAgent {
   web::NavigationItem* item = [self currentNavItem];
-  return item && item->IsOverridingUserAgent();
+  return item && item->GetUserAgentType() == web::UserAgentType::DESKTOP;
 }
 
 - (web::MojoFacade*)mojoFacade {
@@ -2382,12 +2382,11 @@ - (void)updateDesktopUserAgentForEntry:(CRWSessionEntry*)entry
                              fromEntry:(CRWSessionEntry*)fromEntry {
   web::NavigationItemImpl* item = entry.navigationItemImpl;
   web::NavigationItemImpl* fromItem = fromEntry.navigationItemImpl;
-  if (!item || !fromItem)
+  web::UserAgentType itemUserAgentType = item->GetUserAgentType();
+  if (!item || !fromItem || itemUserAgentType == web::UserAgentType::NONE)
     return;
-  bool useDesktopUserAgent = item->IsOverridingUserAgent();
-  if (useDesktopUserAgent != fromItem->IsOverridingUserAgent()) {
+  if (itemUserAgentType != fromItem->GetUserAgentType())
     [self requirePageReconstruction];
-  }
 }
 
 #pragma mark -