[SAA] Prototyping non-cookie extension (Part 5: origin private file system)

The Storage Access API provides access to unpartitioned cookies in
third-party contexts. This CL is part of a series to extend that access
to non-cookie storage/communication mechanisms.

This CL only includes OPFS as a next step for
the new access. We want to be deliberate adding new mechanisms
since we need good testing and security review here.

All access is restricted to experimental contexts for now, no stable
access or origin trial timeline has been published.

Explainer:
https://arichiv.github.io/saa-non-cookie-storage/

Intent to Prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/inRN8tI49O0

Part 1: local/session storage
Part 2: indexeddb
Part 3: web locks
Part 4: cache storage
Part 5: origin private file system
Part 6: quota
Part 7: blob storage
Part 8: broadcast channel
Part 9: shared worker

Bug: 1484966
Change-Id: I17dea8ad85216ab31780cbd277190636c3b71305
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4998167
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Sun Yueru <yrsun@chromium.org>
Auto-Submit: Ari Chivukula <arichiv@chromium.org>
Reviewed-by: Chris Fredrickson <cfredric@chromium.org>
Commit-Queue: Ari Chivukula <arichiv@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1218883}
17 files changed
tree: 6137eea85374451dfdc5bdf01ee15bc180cd71e7
  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. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gitmodules
  58. .gn
  59. .mailmap
  60. .rustfmt.toml
  61. .vpython3
  62. .yapfignore
  63. ATL_OWNERS
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  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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