Move HostKeyPair into protocol::KeyPair.

remoting/protocol/v2_authenticator_unittest.cc

Index: remoting/protocol/v2_authenticator_unittest.cc
diff --git a/remoting/protocol/v2_authenticator_unittest.cc b/remoting/protocol/v2_authenticator_unittest.cc
index dc95318c81300bee298218740f463233b6c86e03..2b0d5f241da8c4840397986b5610240dae2db5ab 100644
--- a/remoting/protocol/v2_authenticator_unittest.cc
+++ b/remoting/protocol/v2_authenticator_unittest.cc
@@ -9,6 +9,7 @@
 #include "remoting/protocol/authenticator_test_base.h"
 #include "remoting/protocol/channel_authenticator.h"
 #include "remoting/protocol/connection_tester.h"
+#include "remoting/protocol/key_pair.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
@@ -41,7 +42,8 @@ class V2AuthenticatorTest : public AuthenticatorTestBase {
   void InitAuthenticators(const std::string& client_secret,
                           const std::string& host_secret) {
     host_ = V2Authenticator::CreateForHost(
-        host_cert_, *private_key_, host_secret, Authenticator::WAITING_MESSAGE);
+        host_cert_, key_pair_->Copy(), host_secret,
+        Authenticator::WAITING_MESSAGE);
     client_ = V2Authenticator::CreateForClient(
         client_secret, Authenticator::MESSAGE_READY);
   }