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

components/offline_pages/offline_page_item.h

 // Copyright 2015 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 COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ITEM_H_
 #define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ITEM_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 17 matching lines @@
   OfflinePageItem();
   OfflinePageItem(const GURL& url,
                   int64_t bookmark_id,
                   const base::FilePath& file_path,
                   int64_t file_size);
   OfflinePageItem(const GURL& url,
                   int64_t bookmark_id,
                   const base::FilePath& file_path,
                   int64_t file_size,
                   const base::Time& creation_time);
+  OfflinePageItem(const OfflinePageItem& other);
   ~OfflinePageItem();
 
   // Gets a URL of the file under |file_path|.
   GURL GetOfflineURL() const;
 
   // Returns true if the page has been marked for deletion. This allows an undo
   // in a short time period. After that, the marked page will be deleted.
   bool IsMarkedForDeletion() const;
 
   // Sets/clears the mark for deletion.
@@ skipping 16 matching lines @@
   base::Time last_access_time;
   // Number of times that the offline archive has been accessed.
   int access_count;
   // Flags about the state and behavior of the offline page.
   Flags flags;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_ITEM_H_