Revert of Moved NavigationManagerImpl serialization out of CRWSessionController.

ios/web/public/crw_navigation_manager_storage.h

Index: ios/web/public/crw_navigation_manager_storage.h
diff --git a/ios/web/public/crw_navigation_manager_storage.h b/ios/web/public/crw_navigation_manager_storage.h
deleted file mode 100644
index d1425d7122b4c172b29d871e0f188ea83c82e125..0000000000000000000000000000000000000000
--- a/ios/web/public/crw_navigation_manager_storage.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2015 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_PUBLIC_CRW_NAVIGATION_MANAGER_STORAGE_H_
-#define IOS_WEB_PUBLIC_CRW_NAVIGATION_MANAGER_STORAGE_H_
-
-#import <Foundation/Foundation.h>
-
-@class CRWSessionCertificatePolicyManager;
-
-// NSCoding-compliant class used to serialize NavigationManager's persisted
-// properties.
-// TODO(crbug.com/685388): Investigate using code from the sessions component.
-@interface CRWNavigationManagerStorage : NSObject<NSCoding>
-
-@property(nonatomic, copy) NSString* tabID;
-@property(nonatomic, copy) NSString* openerID;
-@property(nonatomic, getter=isOpenedByDOM) BOOL openedByDOM;
-@property(nonatomic, assign) NSInteger openerNavigationIndex;
-@property(nonatomic, copy) NSString* windowName;
-@property(nonatomic, assign) NSInteger currentNavigationIndex;
-@property(nonatomic, assign) NSInteger previousNavigationIndex;
-@property(nonatomic, assign) NSTimeInterval lastVisitedTimestamp;
-// TODO(crbug.com/454984): |entries| currently contains CRWSessionEntries.  Once
-// NavigationItemImpls are encoded/decoded using CRWNavigationItemSerializations
-// (analogous to the approach taken with NavigationManager), this will
-// become an array of CRWNavigationItemSerializations.
-@property(nonatomic, copy) NSArray* entries;
-@property(nonatomic, retain)
-    CRWSessionCertificatePolicyManager* sessionCertificatePolicyManager;
-
-@end
-
-#endif  // IOS_WEB_PUBLIC_CRW_NAVIGATION_MANAGER_STORAGE_H_