Add TabContainer to Showcase

ios/showcase/core/showcase_model.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/showcase/core/showcase_model.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @implementation ShowcaseModel
 
 // Insert additional rows in this array. All rows will be sorted upon
 // import into Showcase.
 // |kShowcaseClassForDisplayKey| and |kShowcaseClassForInstantiationKey| are
 // required. |kShowcaseUseCaseKey| is optional.
 + (NSArray<showcase::ModelRow*>*)model {
   return @[
     @{
-      showcase::kClassForDisplayKey : @"SettingsViewController",
-      showcase::kClassForInstantiationKey : @"SCSettingsCoordinator",
-      showcase::kUseCaseKey : @"Main settings screen",
-    },
-    @{
       showcase::kClassForDisplayKey : @"ContentSuggestionsViewController",
       showcase::kClassForInstantiationKey : @"SCSuggestionsCoordinator",
       showcase::kUseCaseKey : @"New Suggestions UI",
     },
     @{
       showcase::kClassForDisplayKey : @"MenuViewController",
       showcase::kClassForInstantiationKey : @"MenuViewController",
       showcase::kUseCaseKey : @"Tools menu",
     },
     @{
-      showcase::kClassForDisplayKey : @"UITableViewCell",
-      showcase::kClassForInstantiationKey : @"UIKitTableViewCellViewController",
-      showcase::kUseCaseKey : @"UIKit Table Cells",
+      showcase::kClassForDisplayKey : @"SettingsViewController",
+      showcase::kClassForInstantiationKey : @"SCSettingsCoordinator",
+      showcase::kUseCaseKey : @"Main settings screen",
     },
     @{
       showcase::kClassForDisplayKey : @"TabGridViewController",
       showcase::kClassForInstantiationKey : @"SCTabGridCoordinator",
       showcase::kUseCaseKey : @"Tab grid",
     },
     @{
       showcase::kClassForDisplayKey : @"TabStripContainerViewController",
       showcase::kClassForInstantiationKey : @"SCTabStripCoordinator",
       showcase::kUseCaseKey : @"Tab strip container",
     },
     @{
+      showcase::kClassForDisplayKey : @"TopToolbarTabViewController",
+      showcase::kClassForInstantiationKey : @"SCTopToolbarTabCoordinator",
+      showcase::kUseCaseKey : @"Top toolbar tab",
+    },
+    @{
+      showcase::kClassForDisplayKey : @"BottomToolbarTabViewController",
+      showcase::kClassForInstantiationKey : @"SCBottomToolbarTabCoordinator",
+      showcase::kUseCaseKey : @"Bottom toolbar tab",
+    },
+    @{
       showcase::kClassForDisplayKey : @"ToolbarViewController",
       showcase::kClassForInstantiationKey : @"SCToolbarCoordinator",
       showcase::kUseCaseKey : @"Toolbar",
     },
+    @{
+      showcase::kClassForDisplayKey : @"UITableViewCell",
+      showcase::kClassForInstantiationKey : @"UIKitTableViewCellViewController",
+      showcase::kUseCaseKey : @"UIKit Table Cells",
+    },
   ];
 }
 
 @end