Update from https://crrev.com/304121

sandbox/linux/syscall_broker/broker_host.h

Index: sandbox/linux/syscall_broker/broker_host.h
diff --git a/sandbox/linux/syscall_broker/broker_host.h b/sandbox/linux/syscall_broker/broker_host.h
index 04c20ed5a1b8615a7c90c9f0c7ae0837babbdb33..9866507d1c6f4312ff37a25a4b28811eba8975c0 100644
--- a/sandbox/linux/syscall_broker/broker_host.h
+++ b/sandbox/linux/syscall_broker/broker_host.h
@@ -6,6 +6,7 @@
 #define SANDBOX_LINUX_SYSCALL_BROKER_BROKER_HOST_H_
 
 #include "base/macros.h"
+#include "sandbox/linux/syscall_broker/broker_channel.h"
 
 namespace sandbox {
 
@@ -18,14 +19,18 @@ class BrokerPolicy;
 // |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);
 };