[ios] RootCoordinator and view controller.

ios/clean/chrome/browser/ui/toolbar/toolbar_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/toolbar/toolbar_view_controller.h"
 
 #import "base/mac/foundation_util.h"
 #import "ios/clean/chrome/browser/ui/actions/tab_grid_actions.h"
 #import "ios/clean/chrome/browser/ui/actions/tab_strip_actions.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/tools_menu_commands.h"
 #import "ios/clean/chrome/browser/ui/toolbar/toolbar_button+factory.h"
 #import "ios/clean/chrome/browser/ui/toolbar/toolbar_component_options.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 // Stackview Vertical Margin.
@@ skipping 255 matching lines @@
 }
 
 - (void)stop:(id)sender {
   [self.dispatcher stopLoadingPage];
 }
 
 - (void)reload:(id)sender {
   [self.dispatcher reloadPage];
 }
 
+- (void)showTabGrid:(id)sender {
+  [self.dispatcher showTabGrid];
+}
+
 #pragma mark - TabStripEvents
 
 - (void)tabStripDidShow:(id)sender {
   self.tabSwitchStripButton.hiddenInCurrentState = YES;
   self.tabSwitchGridButton.hiddenInCurrentState = NO;
   [self updateAllButtonsVisibility];
 }
 
 - (void)tabStripDidHide:(id)sender {
   self.tabSwitchStripButton.hiddenInCurrentState = NO;
   self.tabSwitchGridButton.hiddenInCurrentState = YES;
   [self updateAllButtonsVisibility];
 }
 
 #pragma mark - Helper Methods
 
 // Updates all Buttons visibility to match any recent WebState change.
 - (void)updateAllButtonsVisibility {
   for (UIView* view in self.stackView.arrangedSubviews) {
     if ([view isKindOfClass:[ToolbarButton class]]) {
       ToolbarButton* button = base::mac::ObjCCastStrict<ToolbarButton>(view);
       [button setHiddenForCurrentStateAndSizeClass];
     }
   }
 }
 
 @end