[Extensions] Toggle registered user scripts according to dev mode

The userScripts API is gated on the user being in developer mode. If
the user exits developer mode, any registered user scripts should no
longer run.

Add support for disabling and re-enabling these user scripts when the
user enters or exits dev mode. Note that this deliberately does *not*
remove the scripts from the storage in
`ExtensionUserScriptLoader::loaded_dynamic_scripts_` and only removes
them from the base `UserScriptLoader` (which notifies all renderers
appropriately). This ensures that when subsequent updates and writes
occur, the user scripts are still correctly persisted in the database
and makes re-enabling them simple.

A future CL will properly initialize the enabled state of user scripts
on browser startup and ExtensionUserScriptLoader initialization.

Bug: 1495451
Change-Id: If0380b1df794f74567d3ff5e04497f68649ad01e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4984712
Commit-Queue: Devlin Cronin <rdevlin.cronin@chromium.org>
Reviewed-by: Kelvin Jiang <kelvinjiang@chromium.org>
Reviewed-by: Emilia Paz <emiliapaz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1216434}
10 files changed
tree: a7d00a46768f363ed89f66a1013c9f8b25732ed8
  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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