ozone/wayland: Fix data objects initialization and ownership

DataDevice-related wrappers initialization and ownership, for both
standard and GTK's primary selection, are quite confusing and spread
over different parts of the backend code. This CL fixes and simplifies
it by:

- Moving {WaylandData,GtkPrimarySelection}Device ownership to their
respective DataManager wrapper class. E.g: WaylandDataDeviceManager owns
WaylandDataDevice singleton;

- Fix WaylandClipboard initialization whether the compositor happens to
advertise GtkPrimarySelectionDeviceManager after wl_seat and
wl_data_device_manager;

- Use dependency injection to provide DataSources with the correct
DataDevice instance at their construction time;

- Clean up WaylandConnection by getting rid of the multiple (and almost
unused) data device getters from it as well as removing unneeded header
includes.

Bug: 896640
Change-Id: Ie12964fdf4e7b78bbbd9a11e133ab082613f1c7b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2216320
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Commit-Queue: Nick Yamane <nickdiego@igalia.com>
Cr-Commit-Position: refs/heads/master@{#773235}
16 files changed
tree: d22530cea47980679234da3c8fe3a389df0e24d7
  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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