Remove UIKit selection in TabGridModeSelection

When in TabGridModeSelection, we don't use the UICollectionView
selectioon/selected API. We use a custom array. This means that the
selected cell from TabGridModeNormal is still considered by UIKit as
selected when in TabGridModeSelection.
This is fine as it was ignored when displaying cells, but not when
interacting through VoiceOver, where the UIKit selection status was read
aloud before our custom selection status, leading to:
- "Selected, New Tab, Unselected".

This CL clears the UIKit selection when entering TabGridModeSelection.
The UIKit selection is reset already when leaving TabGridModeSelection.

Fixed: 1469864
Change-Id: I9306525eba5508194250cec05571702f98ecec0c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4859719
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Auto-Submit: Louis Romero <lpromero@google.com>
Reviewed-by: Aliona Dangla <alionadangla@chromium.org>
Commit-Queue: Louis Romero <lpromero@google.com>
Cr-Commit-Position: refs/heads/main@{#1195433}
1 file changed
tree: a0ab15ab7382044da63f5a53517d13aab82fed8b
  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. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. webkit/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gitmodules
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython3
  63. .yapfignore
  64. ATL_OWNERS
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  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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