[EasyUnlock] Add a private API for establishing an insecure Bluetooth connection.

chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_bluetooth_util_chromeos.cc

Index: chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_bluetooth_util_chromeos.cc
diff --git a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_bluetooth_util_chromeos.cc b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_bluetooth_util_chromeos.cc
index 83d1ed7c131d6d79e3a6b84955e507f60a78b3f1..f32494293585ef2af4d4de3d2469b94149413d22 100644
--- a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_bluetooth_util_chromeos.cc
+++ b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_bluetooth_util_chromeos.cc
@@ -20,6 +20,7 @@
 #include "base/time/time.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/bluetooth/bluetooth_device.h"
+#include "device/bluetooth/bluetooth_device_chromeos.h"
 #include "net/socket/socket_descriptor.h"
 
 // The bluez headers are (intentionally) not available within the Chromium
@@ -137,6 +138,15 @@ void SeekBluetoothDeviceByAddress(const std::string& device_address,
       callback);
 }
 
+void ConnectToBluetoothServiceInsecurely(
+    device::BluetoothDevice* device,
+    const device::BluetoothUUID& uuid,
+    const BluetoothDevice::ConnectToServiceCallback& callback,
+    const BluetoothDevice::ConnectToServiceErrorCallback& error_callback) {
+  static_cast<chromeos::BluetoothDeviceChromeOS*>(device)
+      ->ConnectToServiceInsecurely(uuid, callback, error_callback);
+}
+
 }  // namespace easy_unlock
 }  // namespace api
 }  // namespace extensions