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

components/omnibox/browser/in_memory_url_index_types.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 "components/omnibox/browser/in_memory_url_index_types.h"
 
 #include <algorithm>
 #include <functional>
 #include <iterator>
 #include <numeric>
@@ skipping 138 matching lines @@
   Char16Set characters;
   for (base::string16::const_iterator iter = term.begin(); iter != term.end();
        ++iter)
     characters.insert(*iter);
   return characters;
 }
 
 // HistoryInfoMapValue ---------------------------------------------------------
 
 HistoryInfoMapValue::HistoryInfoMapValue() {}
+HistoryInfoMapValue::HistoryInfoMapValue(const HistoryInfoMapValue& other) =
+    default;
 HistoryInfoMapValue::~HistoryInfoMapValue() {}
 
 // RowWordStarts ---------------------------------------------------------------
 
 RowWordStarts::RowWordStarts() {}
+RowWordStarts::RowWordStarts(const RowWordStarts& other) = default;
 RowWordStarts::~RowWordStarts() {}
 
 void RowWordStarts::Clear() {
   url_word_starts_.clear();
   title_word_starts_.clear();
 }