[ios] Change API to inform WebStateList of opener-opened relationship.

ios/shared/chrome/browser/tabs/web_state_list_order_controller_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.
 
 #import "ios/shared/chrome/browser/tabs/web_state_list_order_controller.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #import "ios/shared/chrome/browser/tabs/fake_web_state_list_delegate.h"
 #import "ios/shared/chrome/browser/tabs/web_state_list.h"
+#import "ios/shared/chrome/browser/tabs/web_state_opener.h"
 #import "ios/web/public/test/fakes/test_navigation_manager.h"
 #import "ios/web/public/test/fakes/test_web_state.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 #include "ui/base/page_transition_types.h"
 
 namespace {
 const char kURL[] = "https://chromium.org/";
 
 // A fake NavigationManager used to test opener-opened relationship in the
@@ skipping 30 matching lines @@
     test_web_state->SetNavigationManager(
         base::MakeUnique<FakeNavigationManager>());
     return test_web_state.release();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebStateListOrderControllerTest);
 };
 
 TEST_F(WebStateListOrderControllerTest, DetermineInsertionIndex) {
-  web_state_list_.InsertWebState(0, CreateWebState(), nullptr);
-  web_state_list_.InsertWebState(1, CreateWebState(), nullptr);
+  web_state_list_.InsertWebState(0, CreateWebState());
+  web_state_list_.InsertWebState(1, CreateWebState());
   web::WebState* opener = web_state_list_.GetWebStateAt(0);
 
   // Verify that first child WebState is inserted after |opener| if there are
   // no other children.
   EXPECT_EQ(1, order_controller_.DetermineInsertionIndex(
                    ui::PAGE_TRANSITION_LINK, opener));
 
   // Verify that child WebState is inserted at the end if it is not a "LINK"
   // transition.
   EXPECT_EQ(2, order_controller_.DetermineInsertionIndex(
                    ui::PAGE_TRANSITION_GENERATED, opener));
 
   // Verify that  WebState is inserted at the end if it has no opener.
   EXPECT_EQ(2, order_controller_.DetermineInsertionIndex(
                    ui::PAGE_TRANSITION_LINK, nullptr));
 
   // Add a child WebState to |opener|, and verify that a second child would be
   // inserted after the first.
-  web_state_list_.InsertWebState(2, CreateWebState(), opener);
+  web_state_list_.InsertWebState(2, CreateWebState());
+  web_state_list_.SetOpenerOfWebStateAt(2, WebStateOpener(opener));
 
   EXPECT_EQ(3, order_controller_.DetermineInsertionIndex(
                    ui::PAGE_TRANSITION_LINK, opener));
 
   // Add a grand-child to |opener|, and verify that adding another child to
   // |opener| would be inserted before the grand-child.
-  web_state_list_.InsertWebState(3, CreateWebState(),
-                                 web_state_list_.GetWebStateAt(1));
+  web_state_list_.InsertWebState(3, CreateWebState());
+  web_state_list_.SetOpenerOfWebStateAt(
+      3, WebStateOpener(web_state_list_.GetWebStateAt(1)));
 
   EXPECT_EQ(3, order_controller_.DetermineInsertionIndex(
                    ui::PAGE_TRANSITION_LINK, opener));
 }