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

chrome/browser/net/url_info.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.
 
 // A UrlInfo object is used to store prediction related information about a host
 // port and scheme triplet.  When performing DNS pre-resolution of the host/port
 // pair, its state is monitored as it is resolved.
 // It includes progress, from placement in the Predictor's queue, to resolution
 // by the DNS service as either FOUND or NO_SUCH_NAME.  Each instance may also
 // hold records of previous resolution times, which might later be shown to be
@@ skipping 57 matching lines @@
   typedef std::vector<UrlInfo> UrlInfoTable;
 
   static base::TimeDelta NullDuration() {
     return base::TimeDelta::FromMilliseconds(-1);
   }
 
   // UrlInfo are usually made by the default constructor during
   // initializing of the Predictor's map (of info for Hostnames).
   UrlInfo();
 
+  UrlInfo(const UrlInfo& other);
+
   ~UrlInfo();
 
   // NeedDnsUpdate decides, based on our internal info,
   // if it would be valuable to attempt to update (prefectch)
   // DNS data for hostname.  This decision is based
   // on how recently we've done DNS prefetching for hostname.
   bool NeedsDnsUpdate();
 
   // FOR TEST ONLY: The following access the otherwise constant values.
   static void set_cache_expiration(base::TimeDelta time);
@@ skipping 91 matching lines @@
   GURL referring_url_;
 
   // We put these objects into a std::map, and hence we
   // need some "evil" constructors.
   // DISALLOW_COPY_AND_ASSIGN(UrlInfo);
 };
 
 }  // namespace chrome_browser_net
 
 #endif  // CHROME_BROWSER_NET_URL_INFO_H_