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

chrome/browser/predictors/autocomplete_action_predictor.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 CHROME_BROWSER_PREDICTORS_AUTOCOMPLETE_ACTION_PREDICTOR_H_
 #define CHROME_BROWSER_PREDICTORS_AUTOCOMPLETE_ACTION_PREDICTOR_H_
 
 #include <map>
 #include <tuple>
 
@@ skipping 106 matching lines @@
 
   // Should be called when a URL is opened from the omnibox.
   void OnOmniboxOpenedUrl(const OmniboxLog& log);
 
  private:
   friend class AutocompleteActionPredictorTest;
   friend class ::PredictorsHandler;
 
   struct TransitionalMatch {
     TransitionalMatch();
+    TransitionalMatch(const TransitionalMatch& other);
     ~TransitionalMatch();
 
     base::string16 user_text;
     std::vector<GURL> urls;
 
     bool operator==(const base::string16& other_user_text) const {
       return user_text == other_user_text;
     }
   };
 
@@ skipping 125 matching lines @@
 
   ScopedObserver<history::HistoryService, history::HistoryServiceObserver>
       history_service_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(AutocompleteActionPredictor);
 };
 
 }  // namespace predictors
 
 #endif  // CHROME_BROWSER_PREDICTORS_AUTOCOMPLETE_ACTION_PREDICTOR_H_