Add more out of line copy ctors for complex classes.

net/quic/crypto/quic_compressed_certs_cache.h

 // Copyright 2016 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 NET_QUIC_CRYPTO_QUIC_COMPRESSED_CERTS_CACHE_H_
 #define NET_QUIC_CRYPTO_QUIC_COMPRESSED_CERTS_CACHE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 56 matching lines @@
   };
 
   // Certs stored by QuicCompressedCertsCache where uncompressed certs data is
   // used to identify the uncompressed representation of certs and
   // |compressed_cert| is the cached compressed representation.
   class CachedCerts {
    public:
     CachedCerts();
     CachedCerts(const UncompressedCerts& uncompressed_certs,
                 const string& compressed_cert);
+    CachedCerts(const CachedCerts& other);
 
     ~CachedCerts();
 
     // Returns true if the |uncompressed_certs| matches uncompressed
     // representation of this cert.
     bool MatchesUncompressedCerts(
         const UncompressedCerts& uncompressed_certs) const;
 
     const string* compressed_cert() const;
 
@@ skipping 13 matching lines @@
 
   // Key is a unit64_t hash for UncompressedCerts. Stored associated value is
   // CachedCerts which has both original uncompressed certs data and the
   // compressed representation of the certs.
   base::MRUCache<uint64_t, CachedCerts> certs_cache_;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_QUIC_COMPRESSED_CERTS_CACHE_H_