Fixes https://github.com/flutter/flutter/issues/154857.
Does so by:
* adding `await chromiumLauncher.connect(chrome, false);` before the `close` call to make sure we enter[ the block ](9cd2fc90af/packages/flutter_tools/lib/src/web/chrome.dart (L521-L535))that actually tries to close chromium
* adding an `onGetTab` callback to `FakeChromeConnectionWithTab`, which the test now uses to throw a StateError upon `getTab` getting called.
## How I verified this change
1. Change `Chromium.close` from using the safer `getChromeTabGuarded` function to using the previous method of calling `ChromeConnection.getTab` directly. Do so by applying this diff:
```diff
diff --git a/packages/flutter_tools/lib/src/web/chrome.dart b/packages/flutter_tools/lib/src/web/chrome.dart
index c9a5fdab81..81bc246ff9 100644
--- a/packages/flutter_tools/lib/src/web/chrome.dart
+++ b/packages/flutter_tools/lib/src/web/chrome.dart
@@ -520,7 +520,7 @@ class Chromium {
Duration sigtermDelay = Duration.zero;
if (_hasValidChromeConnection) {
try {
- final ChromeTab? tab = await getChromeTabGuarded(chromeConnection,
+ final ChromeTab? tab = await chromeConnection.getTab(
(_) => true, retryFor: const Duration(seconds: 1));
if (tab != null) {
final WipConnection wipConnection = await tab.connect();
```
2. Then, run the test, which should correctly fail:
```
dart test test/web.shard/chrome_test.dart --name="chrome.close can recover if getTab throws a StateError"`
```
3. Revert the change from step 1 and run again. The test should now pass.
The choice screen is irrelevant when debugging apps locally. `flutter run` creates a separate user profile for testing only. It doesn't touch users' browser settings.
Fixes https://github.com/flutter/flutter/issues/153928
Fixes https://github.com/flutter/flutter/issues/153972 (unless the cause of https://github.com/flutter/flutter/issues/153064#issuecomment-2305662791 happens to also prevent this fix from working).
In this PR, I've looked for all non-test call sites of `ChromeConnection.getTabs` and made sure are all wrapped in `try` blocks that handle `IOException` (`HttpException` is what we see in crash reporting, but I figure any `IOException` might as well be the same for all intents and purposes).
I plan on cherry-picking this the stable branch.
https://github.com/flutter/flutter/pull/150645 tries to shut down Chrome by sending a browser close command through a debug protocol. The webkit_inspection_protocol library used to send the command may throw a SocketException if Chrome has already been shut down.
The previous approach of killing the Chromium parent process sometimes caused leaks of child processes on Windows. The Browser.close command in the debug protocol will tell Chromium to shut down all of its processes.
This implements https://github.com/flutter/flutter/issues/132654#issuecomment-1738221257, namely:
Make `Chromium.close` more robust:
* Send `SIGTERM` and wait up to 5 seconds, if the process exited, great! Return from the function.
* If the process has not exited, then send a `SIGKILL`, which is a much firmer way to exit a process. Same as before, wait up to 5 seconds, if the process exited, great! Return from the function.
* If it still hasn't exited then give up trying to exit Chromium, just print a warning to the console and return from the function.
Bonus: a few nullability fixes and extra `-v` logging.
Fixes https://github.com/flutter/flutter/issues/132654
