[iOS] Refactoring web CRWSessionController user agent code.

ios/chrome/browser/native_app_launcher/native_app_navigation_util_unittest.mm

 // Copyright 2017 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.
 
 #include "ios/chrome/browser/native_app_launcher/native_app_navigation_util.h"
 
 #import "ios/web/navigation/crw_session_controller.h"
 #import "ios/web/navigation/navigation_manager_impl.h"
 #include "ios/web/public/referrer.h"
 #include "ios/web/public/test/web_test.h"
@@ skipping 19 matching lines @@
   void TearDown() override {
     web_state_.reset();
     web::WebTest::TearDown();
   }
 
   web::WebState* web_state() { return web_state_->GetWebState(); }
 
   void AddItem(const std::string& url_spec, ui::PageTransition transition) {
     CRWSessionController* session_controller =
         web_state_->GetNavigationManagerImpl().GetSessionController();
-    [session_controller addPendingItem:GURL(url_spec)
-                              referrer:web::Referrer()
-                            transition:transition
-                     rendererInitiated:NO];
+    web_state_->GetNavigationManagerImpl().AddPendingItem(
+        GURL(url_spec), web::Referrer(), transition,
+        web::NavigationInitiationType::USER_INITIATED);
     [session_controller commitPendingItem];
   }
 
  private:
   std::unique_ptr<web::WebStateImpl> web_state_;
 };
 
 // Tests that default state is not a link click.
 TEST_F(NativeAppNavigationUtilsTest, TestEmpty) {
   EXPECT_FALSE(native_app_launcher::IsLinkNavigation(web_state()));
@@ skipping 37 matching lines @@
 
 // The first non-redirect entry is tested. Earlier redirects do not matter.
 TEST_F(NativeAppNavigationUtilsTest, TestTypedUrlWithRedirectEarlier) {
   AddItem("http://foo.com/page0", ui::PAGE_TRANSITION_LINK);
   AddItem("http://bar.com/page1", ui::PAGE_TRANSITION_SERVER_REDIRECT);
   AddItem("http://blah.com/page2", ui::PAGE_TRANSITION_TYPED);
   EXPECT_FALSE(native_app_launcher::IsLinkNavigation(web_state()));
 }
 
 }  // namespace