Moved |openedByDOM| to WebState's CreateParams and public interface.

ios/web/navigation/navigation_manager_impl.mm

 // Copyright 2013 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/web/navigation/navigation_manager_impl.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 79 matching lines @@
   browser_state_ = browser_state;
   [session_controller_ setBrowserState:browser_state];
 }
 
 void NavigationManagerImpl::SetSessionController(
     CRWSessionController* session_controller) {
   session_controller_.reset(session_controller);
   [session_controller_ setNavigationManager:this];
 }
 
-void NavigationManagerImpl::InitializeSession(BOOL opened_by_dom) {
-  SetSessionController([[CRWSessionController alloc]
-      initWithBrowserState:browser_state_
-               openedByDOM:opened_by_dom]);
+void NavigationManagerImpl::InitializeSession() {
+  SetSessionController(
+      [[CRWSessionController alloc] initWithBrowserState:browser_state_]);
 }
 
 void NavigationManagerImpl::ReplaceSessionHistory(
     std::vector<std::unique_ptr<web::NavigationItem>> items,
     int current_index) {
   SetSessionController([[CRWSessionController alloc]
       initWithBrowserState:browser_state_
            navigationItems:std::move(items)
               currentIndex:current_index]);
 }
@@ skipping 340 matching lines @@
   const ScopedNavigationItemImplList& items = [session_controller_ items];
   while (index >= 0) {
     NavigationItem* item = items[index--].get();
     if (!client->IsAppSpecificURL(item->GetVirtualURL()))
       return item;
   }
   return nullptr;
 }
 
 }  // namespace web