Linux sandbox: change the return type of HandleRequest

sandbox/linux/syscall_broker/broker_process.h

Index: sandbox/linux/syscall_broker/broker_process.h
diff --git a/sandbox/linux/syscall_broker/broker_process.h b/sandbox/linux/syscall_broker/broker_process.h
index d5b521b996c622801eb6f29f760c32bd4617cbb9..c5f7d64e18287e7b801d6f871016c08b83d4d343 100644
--- a/sandbox/linux/syscall_broker/broker_process.h
+++ b/sandbox/linux/syscall_broker/broker_process.h
@@ -19,8 +19,8 @@
 namespace sandbox {
 
 namespace syscall_broker {
+
 class BrokerClient;
-}
 
 // Create a new "broker" process to which we can send requests via an IPC
 // channel by forking the current process.
@@ -83,6 +83,8 @@ class SANDBOX_EXPORT BrokerProcess {
   friend class BrokerProcessTestHelper;
 };
 
+}  // namespace syscall_broker
+
 }  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SERVICES_BROKER_PROCESS_H_