[Mac] App Menu Animated Icon

chrome/browser/ui/cocoa/toolbar/app_toolbar_button.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_TOOLBAR_APP_TOOLBAR_BUTTON_H_
 #define CHROME_BROWSER_UI_COCOA_TOOLBAR_APP_TOOLBAR_BUTTON_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
 
 #import "chrome/browser/ui/cocoa/menu_button.h"
 #include "chrome/browser/ui/toolbar/app_menu_icon_controller.h"
 
+class AppMenuAnimation;
+class AppMenuBridgeCocoa;
+
 // Button for the app toolbar button.
 @interface AppToolbarButton : MenuButton {
  @private
   AppMenuIconController::Severity severity_;
   AppMenuIconController::IconType type_;
+
+  // Used for animating and drawing the app menu icon.
+  std::unique_ptr<AppMenuBridgeCocoa> appMenuBridge_;
+  std::unique_ptr<AppMenuAnimation> appMenuAnimation_;
 }
 
 - (void)setSeverity:(AppMenuIconController::Severity)severity
            iconType:(AppMenuIconController::IconType)iconType
       shouldAnimate:(BOOL)shouldAnimate;
 
+// Called when a new tab had been inserted into the foreground.
+- (void)onTabInsertedInForeground;
+
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_TOOLBAR_APP_TOOLBAR_BUTTON_H_