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

components/wifi_sync/wifi_credential.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 COMPONENTS_WIFI_SYNC_WIFI_CREDENTIAL_H_
 #define COMPONENTS_WIFI_SYNC_WIFI_CREDENTIAL_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 15 matching lines @@
  public:
   // Per IEEE 802.11-2012 (Sec 8.4.2.2), the only requirement on SSIDs
   // is that they are between 0 and 32 bytes in length
   // (inclusive). There are no restrictions on the values of those
   // bytes. The SSID is not, e.g., required to be encoded as UTF-8.
   using SsidBytes = std::vector<uint8_t>;
   using CredentialSet = std::set<
       WifiCredential,
       bool(*)(const WifiCredential&a, const WifiCredential& b)>;
 
+  WifiCredential(const WifiCredential& other);
   ~WifiCredential();
 
   // Creates a WifiCredential with the given |ssid|, |security_class|,
   // and |passphrase|. No assumptions are made about the input
   // encoding of |ssid|. |passphrase|, however, must be valid
   // UTF-8. Returns NULL if the parameters are invalid.
   static scoped_ptr<WifiCredential> Create(
       const SsidBytes& ssid,
       WifiSecurityClass security_class,
       const std::string& passphrase);
@@ skipping 38 matching lines @@
   const SsidBytes ssid_;
   // The WiFi network's security class (e.g. WEP, PSK).
   const WifiSecurityClass security_class_;
   // The passphrase for connecting to the network.
   const std::string passphrase_;
 };
 
 }  // namespace wifi_sync
 
 #endif  // COMPONENTS_WIFI_SYNC_WIFI_CREDENTIAL_H_