[Clean up] Expose ConnectToServiceInsecurely as a BluetoothDevice API on all platforms.

device/bluetooth/bluetooth_device_win.cc

Index: device/bluetooth/bluetooth_device_win.cc
diff --git a/device/bluetooth/bluetooth_device_win.cc b/device/bluetooth/bluetooth_device_win.cc
index 67c2aec154c2aaaad1b89c6b3293f4f1c834572a..a9f690ae0cabf1b4860dc21e86aed9d7b2af94e0 100644
--- a/device/bluetooth/bluetooth_device_win.cc
+++ b/device/bluetooth/bluetooth_device_win.cc
@@ -22,6 +22,8 @@ namespace {
 
 const int kSdpBytesBufferSize = 1024;
 
+const char kApiUnavailable[] = "This API is not implemented on this platform.";
+
 }  // namespace
 
 namespace device {
@@ -263,6 +265,13 @@ void BluetoothDeviceWin::ConnectToService(
   socket->Connect(this, uuid, base::Bind(callback, socket), error_callback);
 }
 
+void BluetoothDeviceWin::ConnectToServiceInsecurely(
+    const BluetoothUUID& uuid,
+    const ConnectToServiceCallback& callback,
+    const ConnectToServiceErrorCallback& error_callback) {
+  error_callback.Run(kApiUnavailable);
+}
+
 void BluetoothDeviceWin::CreateGattConnection(
       const GattConnectionCallback& callback,
       const ConnectErrorCallback& error_callback) {