Moved NavigationManagerImpl serialization out of CRWSessionController.

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 "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 @class CRWSessionEntry;
 @class CRWSessionCertificatePolicyManager;
 @class XCallbackParameters;
 
 namespace web {
 class NavigationManagerImpl;
 struct Referrer;
 struct SSLStatus;
 }
 
 // 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.
 // TODO(stuartmorgan): Move under NavigationManager, and consider merging into
 // NavigationManager.
-@interface CRWSessionController : NSObject<NSCoding, NSCopying>
+@interface CRWSessionController : NSObject<NSCopying>
 
 @property(nonatomic, readonly, retain) NSString* tabId;
 @property(nonatomic, readonly, assign) NSInteger currentNavigationIndex;
 @property(nonatomic, readonly, assign) NSInteger previousNavigationIndex;
 @property(nonatomic, readonly, retain) NSArray* entries;
 @property(nonatomic, copy) NSString* windowName;
 // Indicates whether the page was opened by DOM (e.g. with |window.open|
 // JavaScript call or by clicking a link with |_blank| target).
 @property(nonatomic, readonly, getter=isOpenedByDOM) BOOL openedByDOM;
 @property(nonatomic, readonly, retain)
@@ skipping 113 matching lines @@
 // |entries_| is empty.
 - (CRWSessionEntry*)lastUserEntry;
 
 // Set |useDesktopUserAgentForNextPendingEntry_| to YES if there is no pending
 // entry, otherwise set |useDesktopUserAgent| in the pending entry.
 - (void)useDesktopUserAgentForNextPendingEntry;
 
 @end
 
 #endif  // IOS_WEB_NAVIGATION_CRW_SESSION_CONTROLLER_H_