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

ui/base/ime/chromeos/input_method_manager.h

 // 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.
 
 #ifndef UI_BASE_IME_CHROMEOS_INPUT_METHOD_MANAGER_H_
 #define UI_BASE_IME_CHROMEOS_INPUT_METHOD_MANAGER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 37 matching lines @@
 
   enum MenuItemStyle {
     MENU_ITEM_STYLE_NONE,
     MENU_ITEM_STYLE_CHECK,
     MENU_ITEM_STYLE_RADIO,
     MENU_ITEM_STYLE_SEPARATOR,
   };
 
   struct MenuItem {
     MenuItem();
+    MenuItem(const MenuItem& other);
     virtual ~MenuItem();
 
     std::string id;
     std::string label;
     MenuItemStyle style;
     bool visible;
     bool enabled;
     bool checked;
 
     unsigned int modified;
@@ skipping 229 matching lines @@
   // called to update the IME menu items.
   virtual void NotifyImeMenuItemsChanged(
       const std::string& engine_id,
       const std::vector<MenuItem>& items) = 0;
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // UI_BASE_IME_CHROMEOS_INPUT_METHOD_MANAGER_H_