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

chrome/browser/safe_browsing/protocol_manager.cc

 // 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.
 
 #include "chrome/browser/safe_browsing/protocol_manager.h"
 
 #include <utility>
 
 #include "base/environment.h"
 #include "base/logging.h"
@@ skipping 782 matching lines @@
 }
 
 SafeBrowsingProtocolManager::FullHashDetails::FullHashDetails()
     : callback(), is_download(false) {}
 
 SafeBrowsingProtocolManager::FullHashDetails::FullHashDetails(
     FullHashCallback callback,
     bool is_download)
     : callback(callback), is_download(is_download) {}
 
+SafeBrowsingProtocolManager::FullHashDetails::FullHashDetails(
+    const FullHashDetails& other) = default;
+
 SafeBrowsingProtocolManager::FullHashDetails::~FullHashDetails() {}
 
 SafeBrowsingProtocolManagerDelegate::~SafeBrowsingProtocolManagerDelegate() {}
 
 }  // namespace safe_browsing