Unify Aura and Ozone X11 PlatformCursor

This CL ports Aura/X11 to use X11CursorFactoryOzone, renamed to
X11CursorFactory; and X11CursorOzone, renamed to X11Cursor.

It moves X11Cursor{Factory} to //ui/base/x, to allow access to the
factory from outside of //ui/ozone, in particular, to instantiate it in
aura::Env when not using Ozone.

As a result of these changes, the Aura/X11 code of WebCursor, ui::Cursor
and CursorLoaderX11 can be removed and replaced by the Ozone versions of
the code, that only depend on the generic CursorFactory.

Additionally, X11WindowOzone isn't needed anymore and X11Window is used
instead.

Fixed: 1029142
Change-Id: I438064f8723700d20de23a0d33819d593828c6a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2260642
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782359}
38 files changed
tree: bf81ca1249024a9ac4d09fffca7cddddc555257e
  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. cloud_print/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. jingle/
  31. media/
  32. mojo/
  33. native_client_sdk/
  34. net/
  35. pdf/
  36. ppapi/
  37. printing/
  38. remoting/
  39. rlz/
  40. sandbox/
  41. services/
  42. skia/
  43. sql/
  44. storage/
  45. styleguide/
  46. testing/
  47. third_party/
  48. tools/
  49. ui/
  50. url/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gn
  59. .vpython
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. ENG_REVIEW_OWNERS
  68. LICENSE
  69. LICENSE.chromium_os
  70. OWNERS
  71. PRESUBMIT.py
  72. PRESUBMIT_test.py
  73. PRESUBMIT_test_mocks.py
  74. README.md
  75. WATCHLISTS
README.md

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