Jia Hao 1306b98121 Revert "[web] switch from .didGain/LoseAccessibilityFocus to .focus" (flutter/engine#53679) ...

Reverts flutter/engine#53360

Breaking google3 in b/350131288.

There is a test that does something like the following, to check if a radio button is selected.

```dart
      // Send a bunch of tabs to focus on the correct radio button
      await tester.sendKeyEvent(LogicalKeyboardKey.tab);
      await tester.pump();
      await tester.sendKeyEvent(LogicalKeyboardKey.tab);
      await tester.pump();
      await tester.sendKeyEvent(LogicalKeyboardKey.tab);
      await tester.pump();

      // Toggle the radio button with space
      await tester.sendKeyEvent(LogicalKeyboardKey.space);
      await tester.pump();

      final selectedRadio =
          tester.widget<Radio<bool>>(find.byType(Radio<bool>).at(1));
      expect(selectedRadio.value, isTrue);
```

After this commit, the above test fails. See the linked bug above for more details.

2024-07-02 17:02:06 +00:00

..

src/flutter

Revert "[web] switch from .didGain/LoseAccessibilityFocus to .focus" (flutter/engine#53679)

2024-07-02 17:02:06 +00:00