Prepare Dart Debug Extension for MV3 release (#2293)

Author: elliette

dwds/debug_extension_mv3/pubspec.yaml

@@ -1,6 +1,6 @@
 name: mv3_extension
 publish_to: none
-version: 1.38.0
+version: 2.0.0
 homepage: https://github.com/dart-lang/webdev
 description: >-
   A Chrome extension for Dart debugging.

dwds/debug_extension_mv3/tool/build_extension.dart

@@ -9,8 +9,8 @@
 
 // Run from the extension root directory:
 //    - For dev: dart run tool/build_extension.dart
-//    - For prod: dart run tool/build_extension.dart prod
-//    - For MV3: dart run tool/build_extension.dart --mv3
+//    - For prod: dart run tool/build_extension.dart --prod
+//    - For MV2: dart run tool/build_extension.dart --mv2
 
 import 'dart:convert';
 import 'dart:io';
@@ -19,26 +19,26 @@ import 'package:args/args.dart';
 import 'package:path/path.dart' as p;
 
 const _prodFlag = 'prod';
-const _mv3Flag = 'mv3';
+const _mv2Flag = 'mv2';
 
 void main(List<String> arguments) async {
   final parser = ArgParser()
     ..addFlag(_prodFlag, negatable: true, defaultsTo: false)
-    ..addFlag(_mv3Flag, negatable: true, defaultsTo: false);
+    ..addFlag(_mv2Flag, negatable: true, defaultsTo: false);
   final argResults = parser.parse(arguments);
 
   exitCode = await run(
     isProd: argResults[_prodFlag] as bool,
-    isMV3: argResults[_mv3Flag] as bool,
+    isMV2: argResults[_mv2Flag] as bool,
   );
   if (exitCode != 0) {
     _logWarning('Run terminated unexpectedly with exit code: $exitCode');
   }
 }
 
-Future<int> run({required bool isProd, required bool isMV3}) async {
+Future<int> run({required bool isProd, required bool isMV2}) async {
   _logInfo(
-    'Building ${isMV3 ? 'MV3' : 'MV2'} extension for ${isProd ? 'prod' : 'dev'}',
+    'Building ${isMV2 ? 'MV2' : 'MV3'} extension for ${isProd ? 'prod' : 'dev'}',
   );
   _logInfo('Compiling extension with dart2js to /compiled directory');
   final compileStep = await Process.start(
@@ -50,7 +50,7 @@ Future<int> run({required bool isProd, required bool isMV3}) async {
   if (compileExitCode != 0) {
     return compileExitCode;
   }
-  final manifestFileName = isMV3 ? 'manifest_mv3' : 'manifest_mv2';
+  final manifestFileName = isMV2 ? 'manifest_mv2' : 'manifest_mv3';
   _logInfo('Copying manifest.json to /compiled directory');
   try {
     File(p.join('web', '$manifestFileName.json')).copySync(

dwds/debug_extension_mv3/web/debug_session.dart

@@ -25,7 +25,6 @@ import 'cider_connection.dart';
 import 'cross_extension_communication.dart';
 import 'data_serializers.dart';
 import 'data_types.dart';
-import 'lifeline_ports.dart';
 import 'logger.dart';
 import 'messaging.dart';
 import 'storage.dart';
@@ -381,8 +380,6 @@ Future<bool> _connectToDwds({
     cancelOnError: true,
   );
   _debugSessions.add(debugSession);
-  // Create a connection with the lifeline port to keep the debug session alive:
-  await maybeCreateLifelinePort(dartAppTabId);
   // Send a DevtoolsRequest to the event stream:
   final tabUrl = await _getTabUrl(dartAppTabId);
   debugSession.sendEvent(
@@ -592,10 +589,7 @@ void _removeDebugSession(_DebugSession debugSession) {
   debugSession.sendEvent(event);
   debugSession.close();
   final removed = _debugSessions.remove(debugSession);
-  if (removed) {
-    // Maybe remove the corresponding lifeline connection:
-    maybeRemoveLifelinePort(debugSession.appTabId);
-  } else {
+  if (!removed) {
     debugWarn('Could not remove debug session.');
   }
 }

dwds/debug_extension_mv3/web/lifeline_connection.dart

@@ -1,6 +1,6 @@
 {
   "name": "Dart Debug Extension",
-  "version": "1.40",
+  "version": "2.0",
   "manifest_version": 2,
   "devtools_page": "static_assets/devtools.html",
   "browser_action": {

dwds/debug_extension_mv3/web/lifeline_ports.dart

@@ -1,6 +1,6 @@
 {
   "name": "Dart Debug Extension",
-  "version": "1.40",
+  "version": "2.0",
   "manifest_version": 3,
   "devtools_page": "static_assets/devtools.html",
   "action": {