chromeos: Remove dbus::FileDescriptor from PermissionBrokerClient

device/hid/hid_service_linux.cc

Index: device/hid/hid_service_linux.cc
diff --git a/device/hid/hid_service_linux.cc b/device/hid/hid_service_linux.cc
index 2d878310a493a586d7d274d4bee24a36ed757d68..848d1f145ffab3a6bb8e17835bd6bf612b6546a3 100644
--- a/device/hid/hid_service_linux.cc
+++ b/device/hid/hid_service_linux.cc
@@ -254,12 +254,12 @@ void HidServiceLinux::Connect(const HidDeviceId& device_id,
 
 // static
 void HidServiceLinux::OnPathOpenComplete(std::unique_ptr<ConnectParams> params,
-                                         dbus::FileDescriptor fd) {
+                                         base::ScopedFD fd) {
   scoped_refptr<base::SingleThreadTaskRunner> file_task_runner =
       params->file_task_runner;
-  file_task_runner->PostTask(
-      FROM_HERE, base::Bind(&HidServiceLinux::ValidateFdOnBlockingThread,
-                            base::Passed(&params), base::Passed(&fd)));
+  params->device_file = base::File(fd.release());
+  file_task_runner->PostTask(FROM_HERE, base::Bind(&HidServiceLinux::FinishOpen,
+                                                   base::Passed(&params)));
 }
 
 // static
@@ -272,17 +272,6 @@ void HidServiceLinux::OnPathOpenError(const std::string& device_path,
   callback.Run(nullptr);
 }
 
-// static
-void HidServiceLinux::ValidateFdOnBlockingThread(
-    std::unique_ptr<ConnectParams> params,
-    dbus::FileDescriptor fd) {
-  base::ThreadRestrictions::AssertIOAllowed();
-  fd.CheckValidity();
-  DCHECK(fd.is_valid());
-  params->device_file = base::File(fd.TakeValue());
-  FinishOpen(std::move(params));
-}
-
 #else
 
 // static