chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/frame/opaque_browser_frame_view_layout_unittest.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/ui/views/frame/opaque_browser_frame_view_layout.h"
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/layout_constants.h"
@@ skipping 321 matching lines @@
 
   // Widgets:
   views::ImageButton* minimize_button_ = nullptr;
   views::ImageButton* maximize_button_ = nullptr;
   views::ImageButton* restore_button_ = nullptr;
   views::ImageButton* close_button_ = nullptr;
 
   TabIconView* tab_icon_view_ = nullptr;
   views::Label* window_title_ = nullptr;
 
-  AvatarMenuButton* menu_button_ = nullptr;
   views::MenuButton* avatar_button_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(OpaqueBrowserFrameViewLayoutTest);
 };
 
 TEST_F(OpaqueBrowserFrameViewLayoutTest, BasicWindow) {
   // Tests the layout of a default chrome window with no avatars, no window
   // titles, and a tabstrip.
 
   for (int i = 0; i < 2; ++i) {
@@ skipping 73 matching lines @@
 
   for (int i = 0; i < 2; ++i) {
     root_view_->Layout();
     SCOPED_TRACE(i == 0 ? "Window is restored" : "Window is maximized");
     ExpectCaptionButtons(false, 0);
     ExpectTabStripAndMinimumSize(false);
     ExpectAvatar();
     delegate_->set_maximized(true);
   }
 }