Revert of [cast_channel] Move cast_channel related files from //extensions to //components

components/cast_channel/cast_message_util.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/cast_channel/cast_message_util.h"
-
-#include <memory>
-
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/values.h"
-#include "components/cast_channel/cast_auth_util.h"
-#include "components/cast_channel/proto/cast_channel.pb.h"
-
-namespace {
-static const char kAuthNamespace[] = "urn:x-cast:com.google.cast.tp.deviceauth";
-// Sender and receiver IDs to use for platform messages.
-static const char kPlatformSenderId[] = "sender-0";
-static const char kPlatformReceiverId[] = "receiver-0";
-}  // namespace
-
-namespace cast_channel {
-
-bool IsCastMessageValid(const CastMessage& message_proto) {
-  if (message_proto.namespace_().empty() || message_proto.source_id().empty() ||
-      message_proto.destination_id().empty()) {
-    return false;
-  }
-  return (message_proto.payload_type() == CastMessage_PayloadType_STRING &&
-          message_proto.has_payload_utf8()) ||
-         (message_proto.payload_type() == CastMessage_PayloadType_BINARY &&
-          message_proto.has_payload_binary());
-}
-
-std::string CastMessageToString(const CastMessage& message_proto) {
-  std::string out("{");
-  out += "namespace = " + message_proto.namespace_();
-  out += ", sourceId = " + message_proto.source_id();
-  out += ", destId = " + message_proto.destination_id();
-  out += ", type = " + base::IntToString(message_proto.payload_type());
-  out += ", str = \"" + message_proto.payload_utf8() + "\"}";
-  return out;
-}
-
-std::string AuthMessageToString(const DeviceAuthMessage& message) {
-  std::string out("{");
-  if (message.has_challenge()) {
-    out += "challenge: {}, ";
-  }
-  if (message.has_response()) {
-    out += "response: {signature: (";
-    out += base::SizeTToString(message.response().signature().length());
-    out += " bytes), certificate: (";
-    out += base::SizeTToString(
-        message.response().client_auth_certificate().length());
-    out += " bytes)}";
-  }
-  if (message.has_error()) {
-    out += ", error: {";
-    out += base::IntToString(message.error().error_type());
-    out += "}";
-  }
-  out += "}";
-  return out;
-}
-
-void CreateAuthChallengeMessage(CastMessage* message_proto,
-                                const AuthContext& auth_context) {
-  CHECK(message_proto);
-  DeviceAuthMessage auth_message;
-  auth_message.mutable_challenge()->set_sender_nonce(auth_context.nonce());
-  std::string auth_message_string;
-  auth_message.SerializeToString(&auth_message_string);
-
-  message_proto->set_protocol_version(CastMessage_ProtocolVersion_CASTV2_1_0);
-  message_proto->set_source_id(kPlatformSenderId);
-  message_proto->set_destination_id(kPlatformReceiverId);
-  message_proto->set_namespace_(kAuthNamespace);
-  message_proto->set_payload_type(CastMessage_PayloadType_BINARY);
-  message_proto->set_payload_binary(auth_message_string);
-}
-
-bool IsAuthMessage(const CastMessage& message) {
-  return message.namespace_() == kAuthNamespace;
-}
-
-}  // namespace cast_channel