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

remoting/host/setup/gaia_oauth_client.cc

 // Copyright 2013 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 "remoting/host/setup/gaia_oauth_client.h"
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 
 namespace {
@@ skipping 76 matching lines @@
     const gaia::OAuthClientInfo& oauth_client_info,
     const std::string& auth_code,
     bool need_user_email,
     CompletionCallback on_done) {
   this->oauth_client_info = oauth_client_info;
   this->auth_code = auth_code;
   this->need_user_email = need_user_email;
   this->on_done = on_done;
 }
 
+GaiaOAuthClient::Request::Request(const Request& other) = default;
+
 GaiaOAuthClient::Request::~Request() {
 }
 
 }  // namespace remoting