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

components/safe_browsing_db/hit_report.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.
 //
 // Datastructures that hold details of a Safe Browsing hit for reporting.
 
 #ifndef COMPONENTS_SAFE_BROWSING_DB_HIT_REPORT_H_
 #define COMPONENTS_SAFE_BROWSING_DB_HIT_REPORT_H_
 
 #include "components/safe_browsing_db/util.h"
 #include "url/gurl.h"
 
 namespace safe_browsing {
 
 // What service classified this threat as unsafe.
 enum class ThreatSource {
   UNKNOWN,
   DATA_SAVER,             // From the Data Reduction service.
   LOCAL_PVER3,            // From LocalSafeBrowingDatabaseManager, protocol v3
   LOCAL_PVER4,            // From LocalSafeBrowingDatabaseManager, protocol v4
   REMOTE,                 // From RemoteSafeBrowingDatabaseManager
   CLIENT_SIDE_DETECTION,  // From ClientSideDetectionHost
 };
 
 // Data to report about the contents of a particular threat (malware, phishing,
 // unsafe download URL).  If post_data is non-empty, the request will be
 // sent as a POST instead of a GET.
 struct HitReport {
   HitReport();
+  HitReport(const HitReport& other);
   ~HitReport();
 
   GURL malicious_url;
   GURL page_url;
   GURL referrer_url;
 
   bool is_subresource;
   SBThreatType threat_type;
   ThreatSource threat_source;
   bool is_extended_reporting;
   bool is_metrics_reporting_active;
 
   std::string post_data;
 };
 
 }  // namespace safe_browsing
 
 #endif  // COMPONENTS_SAFE_BROWSING_DB_HIT_REPORT_H_