[iOS] Refactoring web CRWSessionController user agent code.

ios/web/navigation/crw_session_controller.h

 // 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.
 
 #ifndef IOS_WEB_NAVIGATION_CRW_SESSION_CONTROLLER_H_
 #define IOS_WEB_NAVIGATION_CRW_SESSION_CONTROLLER_H_
 
 #import <Foundation/Foundation.h>
 #include <vector>
 
 #include "ios/web/public/navigation_item_list.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 @class CRWSessionEntry;
 @class CRWSessionCertificatePolicyManager;
 
 namespace web {
 class BrowserState;
 class NavigationItemImpl;
 class NavigationManagerImpl;
+enum class NavigationInitiationType;
 struct Referrer;
 }
 
 // A CRWSessionController is similar to a NavigationController object in desktop
 // Chrome. It maintains information needed to save/restore a tab with its
 // complete session history. There is one of these for each tab.
 // DEPRECATED, do not use this class and do not add any methods to it.
 // Use web::NavigationManager instead.
 // TODO(crbug.com/454984): Remove this class.
 @interface CRWSessionController : NSObject<NSCopying>
@@ skipping 57 matching lines @@
 // CRWSessionController doesn't have public constructors. New
 // CRWSessionControllers are created by deserialization, or via a
 // NavigationManager.
 
 // Sets the corresponding NavigationManager.
 - (void)setNavigationManager:(web::NavigationManagerImpl*)navigationManager;
 // Sets the corresponding BrowserState.
 - (void)setBrowserState:(web::BrowserState*)browserState;
 
 // Add a new item with the given url, referrer, and navigation type, making it
-// the current item. If |url| is the same as the current item's url, this
-// does nothing. |referrer| may be nil if there isn't one. The item starts
-// out as pending, and will be lost unless |-commitPendingItem| is called.
+// the current item. If pending item is the same as current item, this does
+// nothing. |referrer| may be nil if there isn't one. The item starts out as
+// pending, and will be lost unless |-commitPendingItem| is called.
 - (void)addPendingItem:(const GURL&)url
               referrer:(const web::Referrer&)referrer
             transition:(ui::PageTransition)type
-     rendererInitiated:(BOOL)rendererInitiated;
+        initiationType:(web::NavigationInitiationType)initiationType;
 
 // Updates the URL of the yet to be committed pending item. Useful for page
 // redirects. Does nothing if there is no pending item.
 - (void)updatePendingItem:(const GURL&)url;
 
 // Commits the current pending item. No changes are made to the item during
 // this process, it is just moved from pending to committed.
 // TODO(pinkerton): Desktop Chrome broadcasts a notification here, should we?
 - (void)commitPendingItem;
 
@@ skipping 29 matching lines @@
 // Removes the item at |index| after discarding any noncomitted entries.
 // |index| must not be the index of the last committed item, or a noncomitted
 // item.
 - (void)removeItemAtIndex:(NSInteger)index;
 
 // Determines whether a navigation between |firstEntry| and |secondEntry| is a
 // same-document navigation.  Entries can be passed in any order.
 - (BOOL)isSameDocumentNavigationBetweenItem:(web::NavigationItem*)firstItem
                                     andItem:(web::NavigationItem*)secondItem;
 
-// Set |useDesktopUserAgentForNextPendingItem_| to YES if there is no pending
-// entry, otherwise set |useDesktopUserAgent| in the pending entry.
-- (void)useDesktopUserAgentForNextPendingItem;
-
 // Returns the index of |item| in |items|.
 - (NSInteger)indexOfItem:(const web::NavigationItem*)item;
 
 @end
 
 #endif  // IOS_WEB_NAVIGATION_CRW_SESSION_CONTROLLER_H_