[WebUI] Migrate NearbyShareUI to WebUIConfig

Context:

Currently WebUI properties, e.g. CSPs, requesting schemes, host, mojo,
etc. are stored in WebUIControllers themselves or in separate lists
like IsWebUIAllowedToMakeNetworkRequests. The lifetime of a
WebUIController is bound to the frame, which makes it hard to use for
some use cases where the WebUIController hasn't been created yet. A
non-dynamically allocated class where clients could query a WebUI's
properties would be easier to use and audit.

WebUIConfig is a class that stores properties of WebUIs. For now the
properties are 1. the WebUI's origin, 2. if the WebUI is enabled,
and 3. GetURLDataSource() method for service worker initialization.
In the future this class could include information like CSPs, if we
should enable Mojo, if we should enable chrome.send(), if we should
allow network requests, URLDataSource, etc.

Bug: 1317510
Change-Id: I6611735b62ddb4e9fb36824e2f42556c47ac6259
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4015342
Reviewed-by: Giovanni Ortuno Urquidi <ortuno@chromium.org>
Commit-Queue: Clement Yan <clamclamyan@google.com>
Cr-Commit-Position: refs/heads/main@{#1069593}
5 files changed
tree: c6fbc9ea5737a83674e531e736dc98eaca826a23
  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. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. DIR_METADATA
  68. ENG_REVIEW_OWNERS
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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