Added switch that let us 'un-stub' certain dbus clients.

chromeos/dbus/bluetooth_agent_service_provider.cc

Index: chromeos/dbus/bluetooth_agent_service_provider.cc
diff --git a/chromeos/dbus/bluetooth_agent_service_provider.cc b/chromeos/dbus/bluetooth_agent_service_provider.cc
index 63e6d77b01306b9c52adb9c0d0a29c76ca024692..46117d180af9ad66076fd842fe82e5a4f468bcd7 100644
--- a/chromeos/dbus/bluetooth_agent_service_provider.cc
+++ b/chromeos/dbus/bluetooth_agent_service_provider.cc
@@ -9,8 +9,8 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
-#include "base/sys_info.h"
 #include "base/threading/platform_thread.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/fake_bluetooth_agent_service_provider.h"
 #include "dbus/bus.h"
 #include "dbus/exported_object.h"
@@ -469,7 +469,7 @@ BluetoothAgentServiceProvider* BluetoothAgentServiceProvider::Create(
     dbus::Bus* bus,
     const dbus::ObjectPath& object_path,
     Delegate* delegate) {
-  if (base::SysInfo::IsRunningOnChromeOS()) {
+  if (!DBusThreadManager::IsUsingStub(DBusClientBundle::BLUETOOTH)) {
     return new BluetoothAgentServiceProviderImpl(bus, object_path, delegate);
   } else {
     return new FakeBluetoothAgentServiceProvider(object_path, delegate);