Fix remoting_unittests that are failing on 32-bit linux

remoting/host/security_key/remote_security_key_ipc_client_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/remote_security_key_ipc_client.h"
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "ipc/ipc_channel.h"
 #include "remoting/host/security_key/fake_ipc_gnubby_auth_handler.h"
 #include "remoting/host/security_key/fake_remote_security_key_ipc_server.h"
+#include "remoting/host/security_key/remote_security_key_ipc_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 const int kTestConnectionId = 1;
 const char kNonexistentIpcChannelName[] = "Nonexistent_IPC_Channel";
 const char kValidIpcChannelName[] =
     "Remote_Security_Key_Ipc_Client_Test_Channel.";
 const int kLargeMessageSizeBytes = 256 * 1024;
 }  // namespace
 
@@ skipping 113 matching lines @@
   OperationComplete(/*failed=*/false);
 }
 
 void RemoteSecurityKeyIpcClientTest::ClientMessageReceived(
     const std::string& response_payload) {
   last_message_received_ = response_payload;
   OperationComplete(/*failed=*/false);
 }
 
 std::string RemoteSecurityKeyIpcClientTest::GenerateUniqueTestChannelName() {
-  return kValidIpcChannelName + IPC::Channel::GenerateUniqueRandomChannelID();
+  return GetChannelNamePathPrefixForTest() + kValidIpcChannelName +
+         IPC::Channel::GenerateUniqueRandomChannelID();
 }
 
 void RemoteSecurityKeyIpcClientTest::EstablishConnection(bool expect_success) {
   // Start up the security key forwarding session IPC channel first, that way
   // we can provide the channel using the fake GnubbyAuthHandler later on.
   std::string ipc_session_channel_name = GenerateUniqueTestChannelName();
   ASSERT_TRUE(fake_ipc_server_.CreateChannel(
       ipc_session_channel_name,
       /*request_timeout=*/base::TimeDelta::FromMilliseconds(500)));
   ASSERT_TRUE(IPC::Channel::IsNamedServerInitialized(ipc_session_channel_name));
@@ skipping 182 matching lines @@
   remote_security_key_ipc_client_.SetExpectedIpcServerSessionIdForTest(
       session_id_ + 1);
 
   // Attempting to establish a connection should fail here since the IPC Server
   // is 'running' in a different session than expected.
   EstablishConnection(/*expect_success=*/false);
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace remoting