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

chrome/browser/browsing_data/browsing_data_service_worker_helper.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 CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_SERVICE_WORKER_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_SERVICE_WORKER_HELPER_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 53 matching lines @@
 // This class is an implementation of BrowsingDataServiceWorkerHelper that does
 // not fetch its information from the Service Worker context, but is passed the
 // info as a parameter.
 class CannedBrowsingDataServiceWorkerHelper
     : public BrowsingDataServiceWorkerHelper {
  public:
   // Contains information about a Service Worker.
   struct PendingServiceWorkerUsageInfo {
     PendingServiceWorkerUsageInfo(const GURL& origin,
                                   const std::vector<GURL>& scopes);
+    PendingServiceWorkerUsageInfo(const PendingServiceWorkerUsageInfo& other);
     ~PendingServiceWorkerUsageInfo();
 
     bool operator<(const PendingServiceWorkerUsageInfo& other) const;
 
     GURL origin;
     std::vector<GURL> scopes;
   };
 
   explicit CannedBrowsingDataServiceWorkerHelper(
       content::ServiceWorkerContext* context);
@@ skipping 22 matching lines @@
 
  private:
   ~CannedBrowsingDataServiceWorkerHelper() override;
 
   std::set<PendingServiceWorkerUsageInfo> pending_service_worker_info_;
 
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataServiceWorkerHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_SERVICE_WORKER_HELPER_H_