Reland "[URL] Make CSPSourceTest pass with non-special URL feature"

This is a reland of commit 7ab6175da13673b73e7d0dde4e0b589763528d46

No change from the reverted CL. The issue is probably in a different
CL. See https://crrev.com/c/5569881 for details.

Original change's description:
> [URL] Make CSPSourceTest pass with non-special URL feature
>
> There are a few tests in CSPSourceTest, namely AllowScheme and
> CustomSchemeWithHost, that would break when we enable the
> StandardCompliandNonSpecialSchemeURLParser feature [^1][^2]:
>
> They fail because, with the feature enabled, url.host() now correctly
> returns the host part for non-special URLs. Previously, it always an
> empty string for non-special URLs.
>
> This CL updates `SourceAllowHost` (defined in csp_sources.cc) to
> preserve the current behavior of CSP when the feature is enabled.
>
> I and reviewers agreed that the current behavior is not desired, but
> decided to preserve the status-quo for now so that we can ship the
> feature without being affected by a change to CSP at the same time.
>
> [^1]:
> https://ci.chromium.org/ui/p/chromium/builders/try/linux-rel/1752691/test-results
> [^2]:
> https://docs.google.com/spreadsheets/d/1Pqw1iKXK_lxHj-kLIAeRFs-khFz-BPZDio1W7SgEVE4/
>
>
> Bug: 40063064
> Change-Id: I2bb4ea179efae2e6d2217a24c81eaec3ab71cdd9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5528336
> Commit-Queue: Hayato Ito <hayato@chromium.org>
> Reviewed-by: Antonio Sartori <antoniosartori@chromium.org>
> Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1304834}

Bug: 40063064
Change-Id: I2bbdefef6a3fe1c66b4eb34414e5e4f944058739
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5569363
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Commit-Queue: Hayato Ito <hayato@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1306556}
2 files changed
tree: cf1007f8d5bca69fade0dd72ca11ec6e1a9f75e0
  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. CPPLINT.cfg
  71. DEPS
  72. DIR_METADATA
  73. LICENSE
  74. LICENSE.chromium_os
  75. OWNERS
  76. PRESUBMIT.py
  77. PRESUBMIT_test.py
  78. PRESUBMIT_test_mocks.py
  79. README.md
  80. WATCHLISTS
README.md

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