use deviceManager discovery in daemon protocol (#28341)

packages/flutter_tools/lib/src/commands/daemon.dart

@@ -6,7 +6,6 @@ import 'dart:async';
 
 import 'package:meta/meta.dart';
 
-import '../android/android_device.dart';
 import '../base/common.dart';
 import '../base/context.dart';
 import '../base/file_system.dart';
@@ -17,22 +16,14 @@ import '../base/utils.dart';
 import '../build_info.dart';
 import '../cache.dart';
 import '../convert.dart';
-import '../desktop.dart';
 import '../device.dart';
 import '../emulator.dart';
-import '../fuchsia/fuchsia_device.dart';
 import '../globals.dart';
-import '../ios/devices.dart';
-import '../ios/simulators.dart';
-import '../linux/linux_device.dart';
-import '../macos/macos_device.dart';
 import '../resident_runner.dart';
 import '../run_cold.dart';
 import '../run_hot.dart';
 import '../runner/flutter_command.dart';
-import '../tester/flutter_tester.dart';
 import '../vmservice.dart';
-import '../windows/windows_device.dart';
 
 const String protocolVersion = '0.4.2';
 
@@ -589,27 +580,21 @@ class DeviceDomain extends Domain {
     registerHandler('forward', forward);
     registerHandler('unforward', unforward);
 
-    addDeviceDiscoverer(FuchsiaDevices());
-    addDeviceDiscoverer(AndroidDevices());
-    addDeviceDiscoverer(IOSDevices());
-    addDeviceDiscoverer(IOSSimulators());
-    addDeviceDiscoverer(FlutterTesterDevices());
-    if (flutterDesktopEnabled) {
-      addDeviceDiscoverer(MacOSDevices());
-      addDeviceDiscoverer(LinuxDevices());
-      addDeviceDiscoverer(WindowsDevices());
-    }
+    // Use the device manager discovery so that client provided device types
+    // are usable via the daemon protocol.
+    deviceManager.deviceDiscoverers.forEach(addDeviceDiscoverer);
   }
 
-  void addDeviceDiscoverer(PollingDeviceDiscovery discoverer) {
+  void addDeviceDiscoverer(DeviceDiscovery discoverer) {
     if (!discoverer.supportsPlatform)
       return;
 
     _discoverers.add(discoverer);
-
+    if (discoverer is PollingDeviceDiscovery) {
       discoverer.onAdded.listen(_onDeviceEvent('device.added'));
       discoverer.onRemoved.listen(_onDeviceEvent('device.removed'));
     }
+  }
 
   Future<void> _serializeDeviceEvents = Future<void>.value();
 

packages/flutter_tools/lib/src/device.dart

@@ -11,6 +11,7 @@ import 'base/context.dart';
 import 'base/file_system.dart';
 import 'base/utils.dart';
 import 'build_info.dart';
+import 'desktop.dart';
 import 'fuchsia/fuchsia_device.dart';
 
 import 'globals.dart';
@@ -35,10 +36,16 @@ class DeviceManager {
     IOSSimulators(),
     FuchsiaDevices(),
     FlutterTesterDevices(),
+  ] + _conditionalDesktopDevices);
+
+  /// Only add desktop devices if the flag is enabled.
+  static List<DeviceDiscovery> get _conditionalDesktopDevices {
+    return flutterDesktopEnabled ? <DeviceDiscovery>[
       MacOSDevices(),
       LinuxDevices(),
       WindowsDevices(),
-  ]);
+    ] : <DeviceDiscovery>[];
+  }
 
   String _specifiedDeviceId;