Reland "Perform extension parent approval migration on Desktop"

This reverts commit 6716444483ab42670ebfd6d7d51653242a3477d5.

Reason for revert: The reason behind the failing test in
6716444483ab42670ebfd6d7d51653242a3477d5 is that the bool
is_active_policy_for_supervised_users_ is read in methods
invoked by the class' constructor, before it is initialized
in `ActivateManagementPolicyAndUpdateRegistration`.
This is part of the existing code, the test just happened
to catch this.

Assigning a default, false value, in the constructor fixes
this. This is the only difference to the original commit.

Original change's description:
> Revert "Perform extension parent approval migration on Desktop"
>
> This reverts commit 8baaf5ef045a0742ff377b5673bda909ab3ae267.
>
> Reason for revert: Causing a Linux MSAN bot to fail: https://ci.chromium.org/ui/p/chromium/builders/ci/Linux%20ChromiumOS%20MSan%20Tests/41702/overview
>
> It appears to be a UAF caused at some point in SupervisedUserExtensionsManager::RefreshApprovedExtensionsFromPrefs()
>
> Original change's description:
> > Perform extension parent approval migration on Desktop
> >
> > When the feature 'EnableSupervisedUserSkipParentApprovalToInstallExtensions'
> > become enabled, the existing extensions on Desktop (Win/Mac/Linux) platforms are marked as locally-parent approved on that device, in a local preference, with a single-run migration.
> > The migration does not apply to ChromeOS platforms
> > where parental controls on extensions are already in place.
> >
> > Bug: b/321240030
> > Change-Id: I929fcb10b8f855602d6852b8195cedea477ed8b7
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5321729
> > Reviewed-by: Finnur Thorarinsson <finnur@chromium.org>
> > Commit-Queue: Anthi Orfanou <anthie@google.com>
> > Reviewed-by: Courtney Wong <courtneywong@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#1270253}
>
> Bug: b/321240030
> Change-Id: Iaae5a62a1e6c8ec03e4247ff1970afc9b2a0fca5
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5356979
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Auto-Submit: Darryl James <dljames@chromium.org>
> Commit-Queue: Darryl James <dljames@chromium.org>
> Owners-Override: Darryl James <dljames@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1270458}

Bug: b/321240030
Change-Id: If93a2a92fb0ddf8dd62135526b7e8515000182c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5358318
Commit-Queue: Anthi Orfanou <anthie@google.com>
Reviewed-by: James Lee <ljjlee@google.com>
Reviewed-by: Finnur Thorarinsson <finnur@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1271469}
7 files changed
tree: 06a18eef651f81cec76463f37b1262bde3feac48
  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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