[ios clean] Use dispatcher for showing TabStrip

ios/clean/chrome/browser/ui/tab/tab_container_view_controller.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/clean/chrome/browser/ui/tab/tab_container_view_controller.h"
 
 #import "ios/clean/chrome/browser/ui/ui_types.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ skipping 236 matching lines @@
 
 - (id)forwardingTargetForSelector:(SEL)aSelector {
   if (aSelector == self.actionToForward) {
     return self.forwardingTarget;
   }
   return nil;
 }
 
 #pragma mark - Tab Strip actions.
 
-- (void)showTabStrip:(id)sender {
-  self.tabStripVisible = YES;
-}
-
 - (void)hideTabStrip:(id)sender {
   self.tabStripVisible = NO;
 }
 
 #pragma mark - Abstract methods to be overriden by subclass
 
 - (Constraints*)subviewConstraints {
   [NSException
        raise:NSInternalInconsistencyException
       format:@"You must override %@ in a subclass", NSStringFromSelector(_cmd)];
@@ skipping 67 matching lines @@
         constraintEqualToAnchor:self.view.leadingAnchor],
     [self.toolbarView.trailingAnchor
         constraintEqualToAnchor:self.view.trailingAnchor],
     self.toolbarHeightConstraint,
     [self.toolbarView.bottomAnchor
         constraintEqualToAnchor:self.bottomLayoutGuide.topAnchor],
   ];
 }
 
 @end