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

ui/base/ime/chromeos/input_method_manager.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 "ui/base/ime/chromeos/input_method_manager.h"
 
 #include "base/logging.h"
 
 namespace chromeos {
 namespace input_method {
 
 namespace {
 InputMethodManager* g_input_method_manager = NULL;
 }
 
 InputMethodManager::State::~State() {
 }
 
 InputMethodManager::MenuItem::MenuItem() {}
 
+InputMethodManager::MenuItem::MenuItem(const MenuItem& other) = default;
+
 InputMethodManager::MenuItem::~MenuItem() {}
 
 // static
 InputMethodManager* InputMethodManager::Get() {
   return g_input_method_manager;
 }
 
 // static
 void InputMethodManager::Initialize(InputMethodManager* instance) {
   DCHECK(!g_input_method_manager) << "Do not call Initialize() multiple times.";
   g_input_method_manager = instance;
 }
 
 // static
 void InputMethodManager::Shutdown() {
   DCHECK(g_input_method_manager)
       << "InputMethodManager() is not initialized.";
   delete g_input_method_manager;
   g_input_method_manager = NULL;
 }
 
 }  // namespace input_method
 }  // namespace chromeos