[ios clean] Use dispatcher for showing TabStrip

ios/showcase/toolbar/sc_toolbar_coordinator.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/showcase/toolbar/sc_toolbar_coordinator.h"
 
 #import "ios/clean/chrome/browser/ui/commands/navigation_commands.h"
 #import "ios/clean/chrome/browser/ui/commands/tab_grid_commands.h"
+#import "ios/clean/chrome/browser/ui/commands/tab_strip_commands.h"
 #import "ios/clean/chrome/browser/ui/commands/tools_menu_commands.h"
 #import "ios/clean/chrome/browser/ui/toolbar/toolbar_view_controller.h"
 #import "ios/showcase/common/protocol_alerter.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 // Toolbar height.
 CGFloat kToolbarHeight = 50.0f;
 }  // namespace
 
 @interface SCToolbarCoordinator ()
 @property(nonatomic, strong) ProtocolAlerter* alerter;
 @end
 
 @implementation SCToolbarCoordinator
 @synthesize baseViewController = _baseViewController;
 @synthesize alerter = _alerter;
 
 - (void)start {
   self.alerter = [[ProtocolAlerter alloc] initWithProtocols:@[
     @protocol(NavigationCommands), @protocol(TabGridCommands),
-    @protocol(ToolsMenuCommands)
+    @protocol(TabStripCommands), @protocol(ToolsMenuCommands)
   ]];
   self.alerter.baseViewController = self.baseViewController;
 
   UIViewController* containerViewController = [[UIViewController alloc] init];
   containerViewController.view.backgroundColor = [UIColor whiteColor];
   containerViewController.title = @"Toolbar";
 
   UIView* containerView = [[UIView alloc] init];
   [containerViewController.view addSubview:containerView];
   containerView.backgroundColor = [UIColor redColor];
   containerView.translatesAutoresizingMaskIntoConstraints = NO;
 
   ToolbarViewController* toolbarViewController =
       [[ToolbarViewController alloc] init];
   toolbarViewController.dispatcher =
-      static_cast<id<NavigationCommands, TabGridCommands, ToolsMenuCommands>>(
-          self.alerter);
+      static_cast<id<NavigationCommands, TabGridCommands, TabStripCommands,
+                     ToolsMenuCommands>>(self.alerter);
   [containerViewController addChildViewController:toolbarViewController];
   toolbarViewController.view.frame = containerView.frame;
   [containerView addSubview:toolbarViewController.view];
   [toolbarViewController didMoveToParentViewController:containerViewController];
 
   [NSLayoutConstraint activateConstraints:@[
     [containerView.heightAnchor constraintEqualToConstant:kToolbarHeight],
     [containerView.leadingAnchor
         constraintEqualToAnchor:containerViewController.view.leadingAnchor],
     [containerView.trailingAnchor
         constraintEqualToAnchor:containerViewController.view.trailingAnchor],
     [containerView.centerYAnchor
         constraintEqualToAnchor:containerViewController.view.centerYAnchor],
   ]];
 
   [self.baseViewController pushViewController:containerViewController
                                      animated:YES];
 }
 
 @end