chrome: Add out-of-line copy ctors for complex classes.

chrome/browser/profiles/avatar_menu.cc

 // Copyright (c) 2012 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/profiles/avatar_menu.h"
 
 #include "base/bind.h"
 #include "base/i18n/case_conversion.h"
 #include "base/metrics/field_trial.h"
 #include "base/profiler/scoped_tracker.h"
@@ skipping 69 matching lines @@
                        size_t profile_index,
                        const gfx::Image& icon)
     : icon(icon),
       active(false),
       signed_in(false),
       signin_required(false),
       menu_index(menu_index),
       profile_index(profile_index) {
 }
 
+AvatarMenu::Item::Item(const Item& other) = default;
+
 AvatarMenu::Item::~Item() {
 }
 
 // static
 bool AvatarMenu::ShouldShowAvatarMenu() {
   // TODO: Eliminate this ifdef. Add a delegate interface for the menu which
   // would also help remove the Browser dependency in AvatarMenuActions
   // implementations.
 #if defined(OS_CHROMEOS)
   // On ChromeOS the menu will not be shown.
@@ skipping 170 matching lines @@
   if (observer_)
     observer_->OnAvatarMenuChanged(this);
 }
 #endif
 
 void AvatarMenu::Update() {
   RebuildMenu();
   if (observer_)
     observer_->OnAvatarMenuChanged(this);
 }