[AXTreeFixing] Apply main node identification to AXTree with ScreenAI service

This CL connects the AXTreeFixingServicesRouter to the underlying
ScreenAI service, and requests main nodes to be annotated when they
have not been annotated by the page author. The Router will call the
ScreenAI service and plumbs the information to the WebContents, which
updates the AXNode in the corresponding BrowserAccessibilityManager.
This feature is currently hidden behind a feature flag, user pref,
and accessibility setting. In upcoming CLs, we will abstract this to
allow for more ways to fix the AXTree, and plumb information to the
renderers.

AX-Relnotes: N/A
Bug: 395134535, 401050816
Change-Id: Ia22197ee1e4475e11b7252ee103ae55c11ba9a1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6411167
Commit-Queue: Mark Schillaci <mschillaci@google.com>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Tzarial <zork@chromium.org>
Reviewed-by: Jocelyn Tran <jocelyntran@google.com>
Cr-Commit-Position: refs/heads/main@{#1441595}
5 files changed
tree: bcd868053854ddbb15b0cd33c1ba953293d29190
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. crypto/
  16. dbus/
  17. device/
  18. docs/
  19. extensions/
  20. fuchsia_web/
  21. gin/
  22. google_apis/
  23. gpu/
  24. headless/
  25. infra/
  26. ios/
  27. ipc/
  28. media/
  29. mojo/
  30. native_client_sdk/
  31. net/
  32. pdf/
  33. ppapi/
  34. printing/
  35. remoting/
  36. rlz/
  37. sandbox/
  38. services/
  39. skia/
  40. sql/
  41. storage/
  42. styleguide/
  43. testing/
  44. third_party/
  45. tools/
  46. ui/
  47. url/
  48. webkit/
  49. .clang-format
  50. .clang-tidy
  51. .clangd
  52. .git-blame-ignore-revs
  53. .gitallowed
  54. .gitattributes
  55. .gitignore
  56. .gitmodules
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. ATL_OWNERS
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. CPPLINT.cfg
  68. CRYPTO_OWNERS
  69. DEPS
  70. DIR_METADATA
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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