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

chromeos/dbus/bluetooth_gatt_service_service_provider.cc

Index: chromeos/dbus/bluetooth_gatt_service_service_provider.cc
diff --git a/chromeos/dbus/bluetooth_gatt_service_service_provider.cc b/chromeos/dbus/bluetooth_gatt_service_service_provider.cc
index 545ccfc9239ed1e893b2e17952841661906275c3..88fd581a67aedda6ce5479b687807b36c3422d84 100644
--- a/chromeos/dbus/bluetooth_gatt_service_service_provider.cc
+++ b/chromeos/dbus/bluetooth_gatt_service_service_provider.cc
@@ -8,8 +8,8 @@
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
-#include "base/sys_info.h"
 #include "base/threading/platform_thread.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/fake_bluetooth_gatt_service_service_provider.h"
 #include "dbus/exported_object.h"
 #include "dbus/message.h"
@@ -269,7 +269,7 @@ BluetoothGattServiceServiceProvider::Create(
     const dbus::ObjectPath& object_path,
     const std::string& uuid,
     const std::vector<dbus::ObjectPath>& includes) {
-  if (base::SysInfo::IsRunningOnChromeOS()) {
+  if (!DBusThreadManager::IsUsingStub(DBusClientBundle::BLUETOOTH)) {
     return new BluetoothGattServiceServiceProviderImpl(
         bus, object_path, uuid, includes);
   }