[Accessibility] Narrator does not announce if menu from tabbed pane is opened or closed

Issue:
Narrator doesn't announce if the menu is expanded or collapsed for the '>>' button on the toolbar.

Changes:
Added logic to detect and set aria-expanded to true or false for the '>>' button on the toolbar.

Before (Not Expanded):
https://imgur.com/plyQmyy
After (Not Expanded):
https://imgur.com/eV6SOMa

Before (Expanded):
https://imgur.com/Qd1EmlL
After (Expanded):
https://imgur.com/gh2OA7X

Bug: 1468631
Change-Id: I765b92725ffde25a5405d91974acaba8e3f45217
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/4729777
Commit-Queue: Jimmy Seto <jimmyseto@microsoft.com>
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
2 files changed
tree: 58d04004938d0281a63de9010841cc3b26b8ed5d
  1. .vscode/
  2. build_overrides/
  3. config/
  4. docs/
  5. extension-api/
  6. extensions/
  7. front_end/
  8. inspector_overlay/
  9. node_modules/
  10. scripts/
  11. test/
  12. third_party/
  13. v8/
  14. .clang-format
  15. .editorconfig
  16. .eslintignore
  17. .eslintrc.js
  18. .git-blame-ignore-revs
  19. .gitattributes
  20. .gitignore
  21. .gitmodules
  22. .gn
  23. .mailmap
  24. .npmignore
  25. .npmrc
  26. .style.yapf
  27. .stylelintignore
  28. .stylelintrc.json
  29. AUTHORS
  30. BUILD.gn
  31. codereview.settings
  32. DEPS
  33. LICENSE
  34. OWNERS
  35. package-lock.json
  36. package.json
  37. PRESUBMIT.py
  38. README.md
  39. tsconfig.json
  40. WATCHLISTS
README.md

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