Make type argument to init*Event for MutationEvent and TextEvent non-optional.

For both events, this matches a WebKit change made in
https://github.com/WebKit/WebKit/commit/6649c3ddc345f2a53920958f5a321e70a09cbf00

For MutationEvent this also matches the Gecko IDL:
https://searchfox.org/mozilla-central/source/dom/webidl/MutationEvent.webidl
(Gecko does not implement TextEvent.)

For TextEvent this matches the proposed spec and tests in
https://github.com/w3c/uievents/pull/362 and
https://github.com/web-platform-tests/wpt/pull/44472 .

For MutationEvent I suppose this matches the ancient spec in
https://www.w3.org/TR/DOM-Level-2-Events/#events-Events-MutationEvent
although that spec uses OMG IDL since it predates WebIDL, so it's
not necessarily clear.

Other events were previously fixed in
https://crrev.com/5e13fac3f90eaed55ceac453466ea3610d9f8b5c and
https://crrev.com/035ad13ca11618ee85f9b32e45a36ddae6104424 .

Fixed: 324276564
Change-Id: I38297ca4982a5f009759bb40d3eded78dbc9ea36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5280630
Reviewed-by: Mason Freed <masonf@chromium.org>
Commit-Queue: David Baron <dbaron@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1262947}
3 files changed
tree: d5df9f8ca304e182db1cbdc10bd0c27045c961c6
  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. DEPS
  71. DIR_METADATA
  72. LICENSE
  73. LICENSE.chromium_os
  74. OWNERS
  75. PRESUBMIT.py
  76. PRESUBMIT_test.py
  77. PRESUBMIT_test_mocks.py
  78. README.md
  79. WATCHLISTS
README.md

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