[ios] WebStateList owns all WebState it manages.

ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm

Index: ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
diff --git a/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm b/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
index 4907234cc4a1dae6497eec6f9cd5ed0b146e83f4..f3c7e076d3c0781d1e9f05c9dc2e2853f4f5edaa 100644
--- a/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
+++ b/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
@@ -828,56 +828,24 @@ enum class SnapshotViewOption {
                            atIndex:(NSUInteger)position
                         transition:(ui::PageTransition)transition
                           tabModel:(TabModel*)tabModel {
-  web::NavigationManager::WebLoadParams params(URL);
-  params.referrer = web::Referrer();
-  params.transition_type = transition;
-
-  DCHECK(tabModel.browserState);
-
-  base::scoped_nsobject<Tab> tab([[Tab alloc]
-      initWithBrowserState:tabModel.browserState
-                    opener:nil
-               openedByDOM:NO
-                     model:tabModel]);
-  [tab webController].webUsageEnabled = tabModel.webUsageEnabled;
-
-  ProceduralBlock dismissWithNewTab = ^{
-    NSUInteger tabIndex = position;
-    if (position > tabModel.count)
-      tabIndex = tabModel.count;
-    [tabModel insertTab:tab atIndex:tabIndex];
-
-    if (tabModel.tabUsageRecorder)
-      tabModel.tabUsageRecorder->TabCreatedForSelection(tab);
-
-    [[tab webController] loadWithParams:params];
-
-    if (tabModel.webUsageEnabled) {
-      [tab setWebUsageEnabled:tabModel.webUsageEnabled];
-      [[tab webController] triggerPendingLoad];
-    }
-
-    NSDictionary* userInfo = @{
-      kTabModelTabKey : tab,
-      kTabModelOpenInBackgroundKey : @(NO),
-    };
-
-    [[NSNotificationCenter defaultCenter]
-        postNotificationName:kTabModelNewTabWillOpenNotification
-                      object:self
-                    userInfo:userInfo];
-
-    [tabModel setCurrentTab:tab];
-
-    [self
-        tabSwitcherDismissWithModel:tabModel
+  NSUInteger tabIndex = position;
+  if (position > tabModel.count)
+    tabIndex = tabModel.count;
+
+  Tab* tab = [tabModel insertTabWithURL:URL
+                               referrer:web::Referrer()
+                             transition:transition
+                                 opener:nil
+                            openedByDOM:NO
+                                atIndex:tabIndex
+                           inBackground:NO];
+
+  [self tabSwitcherDismissWithModel:tabModel
                            animated:YES
                      withCompletion:^{
                        [self.delegate tabSwitcherDismissTransitionDidEnd:self];
                      }];
-  };
 
-  dismissWithNewTab();
   return tab;
 }
 
@@ -1227,7 +1195,12 @@ enum class SnapshotViewOption {
   DCHECK(tab);
   const TabSwitcherSessionType panelSessionType =
       tabSwitcherPanelController.sessionType;
-  [tab close];
+  TabModel* tabModel =
+      panelSessionType == TabSwitcherSessionType::OFF_THE_RECORD_SESSION
+          ? [_tabSwitcherModel otrTabModel]
+          : [_tabSwitcherModel mainTabModel];
+  [tabModel closeTab:tab];
+
   if (panelSessionType == TabSwitcherSessionType::OFF_THE_RECORD_SESSION) {
     base::RecordAction(
         base::UserMetricsAction("MobileTabSwitcherCloseIncognitoTab"));