apmanager: replace scoped_ptr.h with ref_counted.h

scoped_ptr is deprecated and unused in this file. Replace the
header with ref_counted.h to get scoped_refptr instead.

BUG=None
TEST=emerge

Change-Id: Ia443adf38aa13b7a586b7b2a22dfa403aa59c089
Reviewed-on: https://chromium-review.googlesource.com/425086
Commit-Ready: Eric Caruso <ejcaruso@chromium.org>
Tested-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-by: Julan Hsu <julanhsu@google.com>
Reviewed-by: Peter Qiu <zqiu@chromium.org>

dbus/permission_broker_dbus_proxy.h

diff --git a/dbus/permission_broker_dbus_proxy.h b/dbus/permission_broker_dbus_proxy.h
index 8e0c5f9..e87debe 100644
--- a/dbus/permission_broker_dbus_proxy.h
+++ b/dbus/permission_broker_dbus_proxy.h
@@ -20,7 +20,7 @@
 #include <string>
 
 #include <base/macros.h>
-#include <base/memory/scoped_ptr.h>
+#include <base/memory/ref_counted.h>
 #include <permission_broker/dbus-proxies.h>
 
 #include "apmanager/firewall_proxy_interface.h"