Moved NavigationManagerImpl serialization out of CRWSessionController.

ios/chrome/browser/tabs/tab_model_unittest.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 <objc/runtime.h>
 
 #include "base/files/file_path.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ skipping 175 matching lines @@
 
   void RestoreSession(SessionWindowIOS* window) {
     [tab_model_ restoreSessionWindow:window];
   }
 
   // Creates a session window with |entries| entries and a |selectedIndex| of 1.
   SessionWindowIOS* CreateSessionWindow(int entries) {
     SessionWindowIOS* window = [[SessionWindowIOS alloc] init];
     for (int i = 0; i < entries; i++) {
       NSString* windowName = [NSString stringWithFormat:@"window %d", i + 1];
-      [window addSession:CreateWebState(windowName)];
+      [window addSerializedSession:CreateWebState(windowName)
+                                       ->BuildSerializedNavigationManager()];
     }
     if (entries)
       [window setSelectedIndex:1];
     return window;
   }
 
   web::TestWebThreadBundle thread_bundle_;
   IOSChromeScopedTestingChromeBrowserStateManager scoped_browser_state_manager_;
   web::ScopedTestingWebClient web_client_;
   base::scoped_nsobject<SessionWindowIOS> session_window_;
@@ skipping 668 matching lines @@
                browserState:chrome_browser_state.get()]);
   EXPECT_EQ(model.get().currentTab, [model tabAtIndex:1]);
   [model browserStateDestroyed];
 
   // Clean up.
   EXPECT_TRUE([[NSFileManager defaultManager] removeItemAtPath:stashPath
                                                          error:nullptr]);
 }
 
 }  // anonymous namespace