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

components/search_provider_logos/logo_common.cc

 // 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.
 
 #include "components/search_provider_logos/logo_common.h"
 
 #include <stdint.h>
 
 namespace search_provider_logos {
 
 const int64_t kMaxTimeToLiveMS = INT64_C(30 * 24 * 60 * 60 * 1000);  // 30 days
 
 LogoMetadata::LogoMetadata() : can_show_after_expiration(false) {}
+LogoMetadata::LogoMetadata(const LogoMetadata& other) = default;
 LogoMetadata::~LogoMetadata() {}
 
 EncodedLogo::EncodedLogo() {}
+EncodedLogo::EncodedLogo(const EncodedLogo& other) = default;
 EncodedLogo::~EncodedLogo() {}
 
 Logo::Logo() {}
 Logo::~Logo() {}
 
 }  // namespace search_provider_logos