Revert "Use base::apple::Owned[frameworktype] for ui::PlatformEvent"

This reverts commit 326a3f7d3b9a8a7623411baedfd2a33e1c3ab6c2.

Reason for revert: Might be cause of https://crbug.com/1449023

Original change's description:
> Use base::apple::Owned[frameworktype] for ui::PlatformEvent
>
> base::apple::Owned[frameworktype] is a new way to easily generate
> owning wrapper classes for framework types. This CL switches
> ui::PlatformEvent to use it, and does cleanup.
>
> This unlocks the ability to convert ui/events/ to use ARC.
>
> Bug: 1443009
> Bug: 1433041
> Bug: 1280317
> Change-Id: Ib1ffd2f54aa1ba641eebbabe3ed4349b026650f3
> Include-Ci-Only-Tests: true
> Cq-Include-Trybots: luci.chromium.try:ios-blink-dbg-fyi
> Cq-Include-Trybots: luci.chrome.try:mac-chrome
> Validate-Test-Flakiness: skip
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4562796
> Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
> Auto-Submit: Avi Drissman <avi@chromium.org>
> Reviewed-by: Mark Mentovai <mark@chromium.org>
> Commit-Queue: Avi Drissman <avi@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1149240}

Bug: 1443009
Bug: 1433041
Bug: 1280317
Bug: 1449023
Change-Id: I555fed7f7e764b0721275f9224f6721b02c219eb
Cq-Include-Trybots: luci.chromium.try:ios-blink-dbg-fyi
Cq-Include-Trybots: luci.chrome.try:mac-chrome
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4566548
Auto-Submit: Avi Drissman <avi@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1149427}
25 files changed
tree: ebf897591893df3eba78464a55d2bcfd277486a9
  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. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  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. DEPS
  68. DIR_METADATA
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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