[CSP] Fix dedicated worker inheritance

Dedicated workers should populate their Content Security Policy from
parsing their response headers. In chrome, they instead used to inherit
CSP from the creator document. This CL fixes that.

Note that workers with local schemes (data, blob, filesystem) still
inherit CSP from the creator context.

Intent to ship:
https://groups.google.com/a/chromium.org/g/blink-dev/c/sH75Nkx_OZ0

Relevant algorithm in the specification:
https://html.spec.whatwg.org/#initialize-worker-policy-container

Bug: 1012640,1253267
Change-Id: I2630bf1ba9425114758d805d5e0b8a3664cbd906
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3168339
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Carlos IL <carlosil@chromium.org>
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Commit-Queue: Carlos IL <carlosil@chromium.org>
Cr-Commit-Position: refs/heads/main@{#931337}
134 files changed
tree: 7217f5b78a9b4a37cda79cdf9c0ded2c18b3d79b
  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. codelabs/
  14. components/
  15. content/
  16. courgette/
  17. crypto/
  18. dbus/
  19. device/
  20. docs/
  21. extensions/
  22. fuchsia/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. jingle/
  32. media/
  33. mojo/
  34. native_client_sdk/
  35. net/
  36. pdf/
  37. ppapi/
  38. printing/
  39. remoting/
  40. rlz/
  41. sandbox/
  42. services/
  43. skia/
  44. sql/
  45. storage/
  46. styleguide/
  47. testing/
  48. third_party/
  49. tools/
  50. ui/
  51. url/
  52. weblayer/
  53. .clang-format
  54. .clang-tidy
  55. .eslintrc.js
  56. .git-blame-ignore-revs
  57. .gitattributes
  58. .gitignore
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython
  63. .vpython3
  64. .yapfignore
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. DEPS
  70. DIR_METADATA
  71. ENG_REVIEW_OWNERS
  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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