Add flag to switch Chromium OS Bluetooth backend

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 906b69aa7c5e1bd14bfbb5990a8c632f6c65c38f..2e34b96d9147a48d9b493e3e57aeafc6f7db4674 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -16,6 +16,9 @@ const char kDbusStub[] = "dbus-stub";
 // Disables fake ethernet network in the stub implementations.
 const char kDisableStubEthernet[] = "disable-stub-ethernet";
 
+// Enable experimental Bluetooth features.
+const char kEnableExperimentalBluetooth[] = "enable-experimental-bluetooth";
+
 // Enables experiments in locally managed user creation ui.
 const char kEnableLocallyManagedUserUIExperiments[] =
     "enable-locally-managed-users-ui-experiments";