Remove support for setting sandbox flags via "allow"

This removes the experimental FeaturePolicyForSandbox feature, which
allowed a document to set sandbox flags via Permissions Policy (then
Feature Policy). This feature is not going to ship, and the mechanism
being discussed for it in the future is Document Policy, rather than
Permissions Policy.

This also removes the "opener feature state" for popup windows, which
was only used by these features. The Permissions Policy spec does not
support this any more, as all feature state is reset in new top-level
browsing contexts.

Change-Id: Ifc58ce6095892f8c4b968cfc0c02bbe8060d985c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2564396
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Charlie Hu <chenleihu@google.com>
Cr-Commit-Position: refs/heads/master@{#834278}
67 files changed
tree: 336fe759bbc09b40fa7872473967f0c2a6cd4658
  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. .vpython
  61. .vpython3
  62. .yapfignore
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. ENG_REVIEW_OWNERS
  70. LICENSE
  71. LICENSE.chromium_os
  72. OWNERS
  73. PRESUBMIT.py
  74. PRESUBMIT_test.py
  75. PRESUBMIT_test_mocks.py
  76. README.md
  77. WATCHLISTS
README.md

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