chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/toolbar/toolbar_actions_bar_bubble_views.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_VIEWS_TOOLBAR_TOOLBAR_ACTIONS_BAR_BUBBLE_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_ACTIONS_BAR_BUBBLE_VIEWS_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "ui/views/bubble/bubble_dialog_delegate.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/link_listener.h"
 
-class Profile;
 class ToolbarActionsBarBubbleDelegate;
-class ToolbarActionsBarBubbleViewsUnitTest;
 class ToolbarActionsBarBubbleViewsTest;
 
 namespace views {
 class Label;
-class LabelButton;
 class Link;
 }
 
 class ToolbarActionsBarBubbleViews : public views::BubbleDialogDelegateView,
                                      public views::LinkListener {
  public:
   ToolbarActionsBarBubbleViews(
       views::View* anchor_view,
       std::unique_ptr<ToolbarActionsBarBubbleDelegate> delegate);
   ~ToolbarActionsBarBubbleViews() override;
@@ skipping 21 matching lines @@
   void LinkClicked(views::Link* source, int event_flags) override;
 
   std::unique_ptr<ToolbarActionsBarBubbleDelegate> delegate_;
   views::Label* item_list_;
   views::Link* link_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarActionsBarBubbleViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_ACTIONS_BAR_BUBBLE_VIEWS_H_