Construct QuicSocketAddressImpl in QuicChromiumPacketReadder and pass it by const&.

net/quic/platform/api/quic_socket_address.cc

 // Copyright (c) 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.
 
 #include "net/quic/platform/api/quic_socket_address.h"
 
 using std::string;
 
 namespace net {
 
 QuicSocketAddress::QuicSocketAddress(QuicIpAddress address, uint16_t port)
     : impl_(address.impl(), port) {}
 
 QuicSocketAddress::QuicSocketAddress(const struct sockaddr_storage& saddr)
     : impl_(saddr) {}
 
 QuicSocketAddress::QuicSocketAddress(const struct sockaddr& saddr)
     : impl_(saddr) {}
 
 QuicSocketAddress::QuicSocketAddress(const QuicSocketAddressImpl& impl)
     : impl_(impl) {}
 
-bool operator==(QuicSocketAddress lhs, QuicSocketAddress rhs) {
+bool operator==(const QuicSocketAddress& lhs, const QuicSocketAddress& rhs) {
   return lhs.impl_ == rhs.impl_;
 }
 
-bool operator!=(QuicSocketAddress lhs, QuicSocketAddress rhs) {
+bool operator!=(const QuicSocketAddress& lhs, const QuicSocketAddress& rhs) {
   return lhs.impl_ != rhs.impl_;
 }
 
 bool QuicSocketAddress::IsInitialized() const {
   return impl_.IsInitialized();
 }
 
 string QuicSocketAddress::ToString() const {
   return impl_.ToString();
 }
@@ skipping 12 matching lines @@
 
 uint16_t QuicSocketAddress::port() const {
   return impl_.port();
 }
 
 sockaddr_storage QuicSocketAddress::generic_address() const {
   return impl_.generic_address();
 }
 
 }  // namespace net