Mitigate bad cast in OffscreenCanvas::GetFontSelector

This change will cause the browser to crash if the execution context
is not a Window or WorkerGlobalScope.  This is a temporary solution
to handle the case where the execution context is an
AudioWorkletGlobalScope.  The longer term solution, which will be
implemented in a follow-up CL, is to block OffscreenCanvas objects from
being transferred to AudioWorklets, as required by the postMessage spec.

BUG=1334864

(cherry picked from commit 028c11e59fd41bc22eff06dbec10fe9b0e82bd04)

Change-Id: Ief5e37eca6dff14098b12cdbe6fc362c3dd87d1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3722117
Auto-Submit: Justin Novosad <junov@chromium.org>
Reviewed-by: Juanmi Huertas <juanmihd@chromium.org>
Commit-Queue: Juanmi Huertas <juanmihd@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1017357}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3748523
Commit-Queue: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/branch-heads/5060@{#1174}
Cr-Branched-From: b83393d0f4038aeaf67f970a024d8101df7348d1-refs/heads/main@{#1002911}
1 file changed
tree: 29de55b13829cd3f04f69f5f18e05872816ad111
  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/
  22. fuchsia_webengine/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  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. .mailmap
  60. .rustfmt.toml
  61. .vpython
  62. .vpython3
  63. .yapfignore
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. ENG_REVIEW_OWNERS
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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