Intermittent failure to connect to chrome tabs on test bots #94886
Description
Part of issues causing web_tool_tests bot failures. See parent issue: #93256
From build https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20web_tool_tests/4272/overview
01:36 +3 -1: test/web.shard/vm_service_web_test.dart: Clients of flutter run on web with DDS enabled can validate flutter version in parallel [E]
Exception: Received app.stop event while waiting for app.started event
[+1795 ms] FormatException: Unexpected character (at character 1)
<html>
^
#0 _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1405:5)
#1 _ChunkedJsonParser.parseNumber (dart:convert-patch/convert_patch.dart:1272:9)
#2 _ChunkedJsonParser.parse (dart:convert-patch/convert_patch.dart:937:22)
#3 _parseJson (dart:convert-patch/convert_patch.dart:40:10)
#4 JsonDecoder.convert (dart:convert/json.dart:612:36)
#5 JsonCodec.decode (dart:convert/json.dart:216:41)
#6 jsonDecode (dart:convert/json.dart:155:10)
#7 ChromeConnection.getTabs (package:webkit_inspection_protocol/webkit_inspection_protocol.dart:44:10)
<asynchronous suspension>
#8 ChromeConnection.getTab (package:webkit_inspection_protocol/webkit_inspection_protocol.dart:57:25)
<asynchronous suspension>
#9 ChromiumLauncher._connect (package:flutter_tools/src/web/chrome.dart:401:9)
<asynchronous suspension>
#10 ChromiumDevice.startApp (package:flutter_tools/src/web/web_device.dart:134:17)
<asynchronous suspension>
#11 ResidentWebRunner.run.<anonymous closure> (package:flutter_tools/src/isolated/resident_web_runner.dart:307:9)
<asynchronous suspension>
#12 asyncGuard.<anonymous closure> (package:flutter_tools/src/base/async_guard.dart:111:24)
<asynchronous suspension>
Unable to connect to Chrome debug port: 40881