Add a class alias in SessionWindowUnarchiver.

ios/chrome/browser/sessions/session_service.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/sessions/session_service.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/files/file_path.h"
 #include "base/location.h"
@@ skipping 197 matching lines @@
 - (SessionWindowIOS*)loadWindowFromPath:(NSString*)path
                         forBrowserState:(ios::ChromeBrowserState*)browserState {
   // HACK: Handle the case where we had to change the class name of a persisted
   // class on disk.
   [SessionWindowUnarchiver setClass:[CRWSessionCertificatePolicyManager class]
                        forClassName:@"SessionCertificatePolicyManager"];
   [SessionWindowUnarchiver setClass:[CRWSessionStorage class]
                        forClassName:@"SessionController"];
   [SessionWindowUnarchiver setClass:[CRWSessionStorage class]
                        forClassName:@"CRWSessionController"];
+  [SessionWindowUnarchiver setClass:[CRWSessionStorage class]
+                       forClassName:@"CRWNavigationManagerStorage"];
   [SessionWindowUnarchiver setClass:[CRWNavigationItemStorage class]
                        forClassName:@"SessionEntry"];
   [SessionWindowUnarchiver setClass:[CRWNavigationItemStorage class]
                        forClassName:@"CRWSessionEntry"];
   // TODO(crbug.com/661633): Remove this hack.
   [SessionWindowUnarchiver setClass:[SessionWindowIOS class]
                        forClassName:@"SessionWindow"];
   SessionWindowIOS* window = nil;
   @try {
     NSData* data = [NSData dataWithContentsOfFile:path];
@@ skipping 18 matching lines @@
         base::ThreadRestrictions::AssertIOAllowed();
         NSFileManager* fileManager = [NSFileManager defaultManager];
         if (![fileManager fileExistsAtPath:sessionFile])
           return;
         if (![fileManager removeItemAtPath:sessionFile error:nil])
           CHECK(false) << "Unable to delete session file.";
       }));
 }
 
 @end