Removing 'AllowScopedIO' exception from SecurityKeyAuthHandlerLinux

remoting/host/security_key/security_key_extension_session_unittest.cc

 // Copyright 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 "remoting/host/security_key/security_key_extension_session.h"
 
 #include <stddef.h>
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 151 matching lines @@
 
   TestClientStub client_stub_;
   TestClientSessionDetails client_details_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SecurityKeyExtensionSessionTest);
 };
 
 SecurityKeyExtensionSessionTest::SecurityKeyExtensionSessionTest()
     : security_key_extension_session_(
-          new SecurityKeyExtensionSession(&client_details_, &client_stub_)) {
+          new SecurityKeyExtensionSession(&client_details_,
+                                          &client_stub_,
+                                          /*file_task_runner=*/nullptr)) {
   // We want to retain ownership of mock object so we can use it to inject
   // events into the extension session.  The mock object should not be used
   // once |security_key_extension_session_| is destroyed.
   mock_security_key_auth_handler_ = new MockSecurityKeyAuthHandler();
   security_key_extension_session_->SetSecurityKeyAuthHandlerForTesting(
       base::WrapUnique(mock_security_key_auth_handler_));
 }
 
 SecurityKeyExtensionSessionTest::~SecurityKeyExtensionSessionTest() {}
 
@@ skipping 258 matching lines @@
   mock_security_key_auth_handler_->GetSendMessageCallback().Run(42, "test_msg");
 
   client_stub_.WaitForDeliverHostMessage(
       base::TimeDelta::FromMilliseconds(500));
 
   // Expects a JSON array of the ASCII character codes for "test_msg".
   client_stub_.CheckHostDataMessage(42, "[116,101,115,116,95,109,115,103]");
 }
 
 }  // namespace remoting