Refactor serialisation of openerId & openerNavigationIndex.

ios/web/public/test/web_test_with_web_state.mm

 // Copyright 2016 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/public/test/web_test_with_web_state.h"
 
 #include "base/run_loop.h"
 #include "base/strings/sys_string_conversions.h"
 #import "base/test/ios/wait_util.h"
 #include "ios/web/public/web_state/url_verification_constants.h"
@@ skipping 12 matching lines @@
 
 namespace web {
 
 WebTestWithWebState::WebTestWithWebState() {}
 
 WebTestWithWebState::~WebTestWithWebState() {}
 
 void WebTestWithWebState::SetUp() {
   WebTest::SetUp();
   std::unique_ptr<WebStateImpl> web_state(new WebStateImpl(GetBrowserState()));
-  web_state->GetNavigationManagerImpl().InitializeSession(nil, nil, NO, 0);
+  web_state->GetNavigationManagerImpl().InitializeSession(nil, NO);
   web_state->SetWebUsageEnabled(true);
   web_state_.reset(web_state.release());
 
   // Force generation of child views; necessary for some tests.
   [GetWebController(web_state_.get()) triggerPendingLoad];
 }
 
 void WebTestWithWebState::TearDown() {
   web_state_.reset();
   WebTest::TearDown();
@@ skipping 103 matching lines @@
 
 void WebTestWithWebState::WillProcessTask(const base::PendingTask&) {
   // Nothing to do.
 }
 
 void WebTestWithWebState::DidProcessTask(const base::PendingTask&) {
   processed_a_task_ = true;
 }
 
 }  // namespace web