Reland "Add Linux support for the Bluetooth API"

device/bluetooth/dbus/bluez_dbus_manager.h

Index: device/bluetooth/dbus/bluez_dbus_manager.h
diff --git a/device/bluetooth/dbus/bluez_dbus_manager.h b/device/bluetooth/dbus/bluez_dbus_manager.h
index d87fadc572dbffe8454d394f61e0b7de6111441c..fe879c4e0c9d49b1de0da0812ec30b2a4ed8bc5c 100644
--- a/device/bluetooth/dbus/bluez_dbus_manager.h
+++ b/device/bluetooth/dbus/bluez_dbus_manager.h
@@ -57,7 +57,7 @@ class DEVICE_BLUETOOTH_EXPORT BluezDBusManager {
   // We explicitly initialize and shut down the global object, rather than
   // making it a Singleton, to ensure clean startup and shutdown.
   // This will initialize real or stub DBusClients depending on command-line
-  // arguments and whether this process runs in a ChromeOS environment.
+  // arguments and whether this process runs in a real or test environment.
   static void Initialize(dbus::Bus* bus, bool use_dbus_stub);
 
   // Returns a BluezDBusManagerSetter instance that allows tests to