[Mac] Delete the unused AvatarMenuBubbleController and its associated XIB.

chrome/test/BUILD.gn

 # Copyright 2014 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("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 4586 matching lines @@
         "../browser/ui/cocoa/passwords/manage_passwords_view_controller_unittest.mm",
         "../browser/ui/cocoa/passwords/passwords_bubble_cocoa_unittest.mm",
         "../browser/ui/cocoa/passwords/passwords_bubble_controller_unittest.mm",
         "../browser/ui/cocoa/passwords/passwords_list_view_controller_unittest.mm",
         "../browser/ui/cocoa/passwords/save_pending_password_view_controller_unittest.mm",
         "../browser/ui/cocoa/passwords/signin_promo_view_controller_unittest.mm",
         "../browser/ui/cocoa/passwords/update_pending_password_view_controller_unittest.mm",
         "../browser/ui/cocoa/profiles/avatar_button_controller_unittest.mm",
         "../browser/ui/cocoa/profiles/avatar_button_unittest.mm",
         "../browser/ui/cocoa/profiles/avatar_icon_controller_unittest.mm",
-        "../browser/ui/cocoa/profiles/avatar_menu_bubble_controller_unittest.mm",
         "../browser/ui/cocoa/profiles/profile_chooser_controller_unittest.mm",
         "../browser/ui/cocoa/profiles/profile_menu_controller_unittest.mm",
         "../browser/ui/cocoa/profiles/user_manager_mac_unittest.mm",
         "../browser/ui/cocoa/run_loop_testing_unittest.mm",
         "../browser/ui/cocoa/screen_capture_notification_ui_cocoa_unittest.mm",
         "../browser/ui/cocoa/spinner_view_unittest.mm",
         "../browser/ui/cocoa/sprite_view_unittest.mm",
         "../browser/ui/cocoa/status_bubble_mac_unittest.mm",
         "../browser/ui/cocoa/status_icons/status_icon_mac_unittest.mm",
         "../browser/ui/cocoa/styled_text_field_cell_unittest.mm",
@@ skipping 506 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }