[Cast Channel] Add support for nonce challenge to Cast channel authentication.

extensions/browser/api/cast_channel/cast_socket_unittest.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 "extensions/browser/api/cast_channel/cast_socket.h"
 
 #include <stdint.h>
 
 #include <utility>
 #include <vector>
@@ skipping 42 matching lines @@
 using ::testing::SaveArg;
 
 namespace extensions {
 namespace api {
 namespace cast_channel {
 const char kAuthNamespace[] = "urn:x-cast:com.google.cast.tp.deviceauth";
 
 // Returns an auth challenge message inline.
 CastMessage CreateAuthChallenge() {
   CastMessage output;
-  CreateAuthChallengeMessage(&output);
+  CreateAuthChallengeMessage(&output, "");
   return output;
 }
 
 // Returns an auth challenge response message inline.
 CastMessage CreateAuthReply() {
   CastMessage output;
   output.set_protocol_version(CastMessage::CASTV2_1_0);
   output.set_source_id("sender-0");
   output.set_destination_id("receiver-0");
   output.set_payload_type(CastMessage::BINARY);
@@ skipping 134 matching lines @@
                        false,
                        logger,
                        device_capabilities),
         capturing_net_log_(capturing_net_log),
         ip_(ip_endpoint),
         extract_cert_result_(true),
         verify_challenge_result_(true),
         verify_challenge_disallow_(false),
         tcp_unresponsive_(false),
         mock_timer_(new base::MockTimer(false, false)),
-        mock_transport_(nullptr) {}
+        mock_transport_(nullptr) {
+    nonce_ = "";
+  }
 
   ~TestCastSocket() override {}
 
   void SetupMockTransport() {
     mock_transport_ = new MockCastTransport;
     SetTransportForTesting(base::WrapUnique(mock_transport_));
   }
 
   // Socket connection helpers.
   void SetupTcpConnect(net::IoMode mode, int result) {
@@ skipping 548 matching lines @@
                                base::Unretained(&handler_)));
   RunPendingTasks();
 
   EXPECT_EQ(cast_channel::READY_STATE_OPEN, socket_->ready_state());
   EXPECT_EQ(cast_channel::CHANNEL_ERROR_NONE, socket_->error_state());
 }
 
 }  // namespace cast_channel
 }  // namespace api
 }  // namespace extensions