Update from https://crrev.com/304121

sandbox/linux/syscall_broker/broker_host.h

 // 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.
 
 #ifndef SANDBOX_LINUX_SYSCALL_BROKER_BROKER_HOST_H_
 #define SANDBOX_LINUX_SYSCALL_BROKER_BROKER_HOST_H_
 
 #include "base/macros.h"
+#include "sandbox/linux/syscall_broker/broker_channel.h"
 
 namespace sandbox {
 
 namespace syscall_broker {
 
 class BrokerPolicy;
 
 // The BrokerHost class should be embedded in a (presumably not sandboxed)
 // process. It will honor IPC requests from a BrokerClient sent over
 // |ipc_channel| according to |broker_policy|.
 class BrokerHost {
  public:
-  BrokerHost(const BrokerPolicy& broker_policy, int ipc_channel);
+  enum class RequestStatus { LOST_CLIENT = 0, SUCCESS, FAILURE };
+
+  BrokerHost(const BrokerPolicy& broker_policy,
+             BrokerChannel::EndPoint ipc_channel);
   ~BrokerHost();
 
-  bool HandleRequest() const;
+  RequestStatus HandleRequest() const;
 
  private:
   const BrokerPolicy& broker_policy_;
-  const int ipc_channel_;
+  const BrokerChannel::EndPoint ipc_channel_;
+
   DISALLOW_COPY_AND_ASSIGN(BrokerHost);
 };
 
 }  // namespace syscall_broker
 
 }  // namespace sandbox
 
 #endif  //  SANDBOX_LINUX_SYSCALL_BROKER_BROKER_HOST_H_