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

components/bookmarks/browser/bookmark_match.h

 // 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.
 
 #ifndef COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_TITLE_MATCH_H_
 #define COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_TITLE_MATCH_H_
 
 #include <stddef.h>
 
 #include <cstddef>
 #include <utility>
 #include <vector>
 
 namespace bookmarks {
 
 class BookmarkNode;
 
 struct BookmarkMatch {
   // Each MatchPosition is the [begin, end) positions of a match within a
   // string.
   typedef std::pair<size_t, size_t> MatchPosition;
   typedef std::vector<MatchPosition> MatchPositions;
 
   BookmarkMatch();
+  BookmarkMatch(const BookmarkMatch& other);
   ~BookmarkMatch();
 
   // Extracts and returns the offsets from |match_positions|.
   static std::vector<size_t> OffsetsFromMatchPositions(
       const MatchPositions& match_positions);
 
   // Replaces the offsets in |match_positions| with those given in |offsets|,
   // deleting any which are npos, and returns the updated list of match
   // positions.
   static MatchPositions ReplaceOffsetsInMatchPositions(
       const MatchPositions& match_positions,
       const std::vector<size_t>& offsets);
 
   // The matching node of a query.
   const BookmarkNode* node;
 
   // Location of the matching words in the title of the node.
   MatchPositions title_match_positions;
 
   // Location of the matching words in the URL of the node.
   MatchPositions url_match_positions;
 };
 
 }  // namespace bookmarks
 
 #endif  // COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_TITLE_MATCH_H_