wayland: retain origin surface on fallback window drag sessions

Even though not explicitly mentioned in the Wayland spec, most
compositors end the drag session (by emitting wl_data_source.cancelled)
if the origin surface for a dnd session gets destroyed in the middle of
the process.

To fix it, patches WaylandDataDragController to retain the origin
surface until the drag session actually quits, which is already done by
WaylandWindowDragController.

R=max@igalia.com

Bug: 356565284
Change-Id: If95cc8b6a3061c9a6d70c420a8cb002967fc5400
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5753304
Reviewed-by: Max Ihlenfeldt <max@igalia.com>
Commit-Queue: Max Ihlenfeldt <max@igalia.com>
Auto-Submit: Nick Yamane <nickdiego@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1336537}
4 files changed
tree: e60a8e641aa995b28f32dea612a2583750fede74
  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. .clang-format
  52. .clang-tidy
  53. .clangd
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitallowed
  57. .gitattributes
  58. .gitignore
  59. .gitmodules
  60. .gn
  61. .mailmap
  62. .rustfmt.toml
  63. .vpython3
  64. .yapfignore
  65. ATL_OWNERS
  66. AUTHORS
  67. BUILD.gn
  68. CODE_OF_CONDUCT.md
  69. codereview.settings
  70. CPPLINT.cfg
  71. DEPS
  72. DIR_METADATA
  73. LICENSE
  74. LICENSE.chromium_os
  75. OWNERS
  76. PRESUBMIT.py
  77. PRESUBMIT_test.py
  78. PRESUBMIT_test_mocks.py
  79. README.md
  80. WATCHLISTS
README.md

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