Move shared files in net/quic/ into net/quic/core/

net/quic/proto/source_address_token.proto

-// Copyright 2015 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.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-
-import "cached_network_parameters.proto";
-
-package net;
-
-// A SourceAddressToken is serialised, encrypted and sent to clients so that
-// they can prove ownership of an IP address.
-message SourceAddressToken {
-  // ip contains either 4 (IPv4) or 16 (IPv6) bytes of IP address in network
-  // byte order.
-  required bytes ip = 1;
-  // timestamp contains a UNIX timestamp value of the time when the token was
-  // created.
-  required int64 timestamp = 2;
-  // The server can provide estimated network parameters to be used for
-  // initial parameter selection in future connections.
-  optional CachedNetworkParameters cached_network_parameters = 3;
-};
-
-// SourceAddressTokens are simply lists of SourceAddressToken messages.
-message SourceAddressTokens {
-  // This field has id 4 to avoid ambiguity between the serialized form of
-  // SourceAddressToken vs SourceAddressTokens.
-  repeated SourceAddressToken tokens = 4;
-};